W&T Wetenschap & Technologie
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Nieuw ontdekte komeet ISON wordt mogelijk spektakel
Diverse astronomie websites speculeren inmiddels volop over de nieuwe komeet die recentelijk ontdekt is. De komeet, C/2012 S1 (ISON), zou namelijk wel eens op ramkoers kunnen liggen met de zon. De komeet zou zich nu nog in de buurt van Jupiter bevinden en maakt zich op met een "close encounter" met de zon eind volgend jaar. Volgens astronomen zal ISON in november 2013 op 0,012 AU (1,8 miljoen kilometer) van de oppervlakte van de zon razen.
De enorme hitte kan er dan voor zorgen dat de komeet fel zal oplichten. Zo fel zelfs dat de komeet met het blote oog te zien zal zijn.
Veel is er echter over ISON nog niet bekend, net zo min over haar uiteindelijke 'einde'. Karl Battams, werkzaam bij NASA, geeft aan dat er twee mogelijkheden zullen en dat die de komende maanden uitsluitsel moeten gaan bieden.
"Het beste scenario is dat de komeet volgend jaar november langs de zon een zeer groot fel licht zal voortbrengen. De komeet zou zo fel zijn dat hij zelfs negatieve magnitudes moet kunnen halen en zou op het Noordelijk halfrond maandenlang te zien kunnen zijn.
"Een tweede scenario is dat de komeet voortijdig uitdooft of in stukken uiteen valt zoals recentelijk met de veel besproken komeet Elenin is gebeurd. Er zijn in de historie meer kometen geweest die de wetenschap versteld hadden moeten doen staan om vervolgens als een nachtkaars uit te gaan
Het is goed mogelijk dat ISON een nieuwe komeet is die uit de Oort-wolk komt, waardoor ISON zijn allereerste ontmoeting met de zon gaat maken. Als dat zo is dan bestaat de kans dat de komeet, die dan nog nooit eerder onderhevig is geweest aan extreme hitte of zwaartekrachten, in stukken uiteen breekt en wel maanden voordat ze de zon bereikt. "
Beide scenario's zijn goed mogelijk, net zoals 'alles wat er tussen in ligt', aldus de NASA-expert. De komeet zal de komende maanden goed geobserveerd gaan worden. Vanwege de afstand verwacht men de komende tijd weinig nieuws, maar wie weet hebben we eind volgend jaar een prachtig verschijnsel aan de nachtelijke hemel.
Opmerkelijk detail:
Komeet-onderzoeker John Bortle laat weten dat komeet ISON qua baan
opmerkelijke gelijkheden vertoond met de "Great Comet van 1680". Die komeet was destijds de eerste die met een telescoop werd ontdekt en was zo helder dat hij zelfs overdag zichtbaar was met het blote oog. Die komeet was zichtbaar van november 1680 tot en met maart 1681.
Bron: Spaceweather
[ Bericht 0% gewijzigd door Frutsel op 25-09-2012 16:38:52 ]
Diverse astronomie websites speculeren inmiddels volop over de nieuwe komeet die recentelijk ontdekt is. De komeet, C/2012 S1 (ISON), zou namelijk wel eens op ramkoers kunnen liggen met de zon. De komeet zou zich nu nog in de buurt van Jupiter bevinden en maakt zich op met een "close encounter" met de zon eind volgend jaar. Volgens astronomen zal ISON in november 2013 op 0,012 AU (1,8 miljoen kilometer) van de oppervlakte van de zon razen.
De enorme hitte kan er dan voor zorgen dat de komeet fel zal oplichten. Zo fel zelfs dat de komeet met het blote oog te zien zal zijn.
Veel is er echter over ISON nog niet bekend, net zo min over haar uiteindelijke 'einde'. Karl Battams, werkzaam bij NASA, geeft aan dat er twee mogelijkheden zullen en dat die de komende maanden uitsluitsel moeten gaan bieden.
"Het beste scenario is dat de komeet volgend jaar november langs de zon een zeer groot fel licht zal voortbrengen. De komeet zou zo fel zijn dat hij zelfs negatieve magnitudes moet kunnen halen en zou op het Noordelijk halfrond maandenlang te zien kunnen zijn.
"Een tweede scenario is dat de komeet voortijdig uitdooft of in stukken uiteen valt zoals recentelijk met de veel besproken komeet Elenin is gebeurd. Er zijn in de historie meer kometen geweest die de wetenschap versteld hadden moeten doen staan om vervolgens als een nachtkaars uit te gaan
Het is goed mogelijk dat ISON een nieuwe komeet is die uit de Oort-wolk komt, waardoor ISON zijn allereerste ontmoeting met de zon gaat maken. Als dat zo is dan bestaat de kans dat de komeet, die dan nog nooit eerder onderhevig is geweest aan extreme hitte of zwaartekrachten, in stukken uiteen breekt en wel maanden voordat ze de zon bereikt. "
Beide scenario's zijn goed mogelijk, net zoals 'alles wat er tussen in ligt', aldus de NASA-expert. De komeet zal de komende maanden goed geobserveerd gaan worden. Vanwege de afstand verwacht men de komende tijd weinig nieuws, maar wie weet hebben we eind volgend jaar een prachtig verschijnsel aan de nachtelijke hemel.
Opmerkelijk detail:
Komeet-onderzoeker John Bortle laat weten dat komeet ISON qua baan
opmerkelijke gelijkheden vertoond met de "Great Comet van 1680". Die komeet was destijds de eerste die met een telescoop werd ontdekt en was zo helder dat hij zelfs overdag zichtbaar was met het blote oog. Die komeet was zichtbaar van november 1680 tot en met maart 1681.
Bron: Spaceweather
[ Bericht 0% gewijzigd door Frutsel op 25-09-2012 16:38:52 ]
SPOILEROm spoilers te kunnen lezen moet je zijn ingelogd. Je moet je daarvoor eerst gratis Registreren. Ook kun je spoilers niet lezen als je een ban hebt.Cool.
Ik kan me (een jaar of 15) geleden nog herinneren dat Hale Bopp overvloog. Erg gaaf om te zien zo'n heldere komeet!
Dat was toch eind jaren 90? Staat mij ook nog wel iets van bij.quote:Op dinsdag 25 september 2012 17:37 schreef Robus het volgende:
Ik kan me (een jaar of 15) geleden nog herinneren dat Hale Bopp overvloog. Erg gaaf om te zien zo'n heldere komeet!
Op maandag 8 januari 2018 14:29 schreef BadderHaring het volgende:
Ajax is geen club. Dat is een bedrijf.
Ajax is geen club. Dat is een bedrijf.
Klopt!
Wiki:
Wiki:
quote:Komeet Hale-Bopp (officiële aanduiding C/1995 O1) was waarschijnlijk de meest geobserveerde komeet van de 20e eeuw, en was een van de helderste kometen van de afgelopen paar decennia. De komeet was gedurende lange tijd (18 maanden) met het blote oog zichtbaar. Dit is tweemaal zo lang als de vorige recordhouder, de komeet van 1811.
Hale-Bopp werd op 23 juli 1995 ontdekt op een grote afstand van de zon, wat deed vermoeden dat de komeet wel eens bijzonder helder zou kunnen worden in de omgeving van de zon. Dit deed de komeet ook en was gedurende het voorjaar van 1997 gemakkelijk zichtbaar met het blote oog.
Ook gewoon precies15 jaar.
Op maandag 8 januari 2018 14:29 schreef BadderHaring het volgende:
Ajax is geen club. Dat is een bedrijf.
Ajax is geen club. Dat is een bedrijf.
Bron: NOSquote:Spectaculaire komeet op komst
Een komeet die eind 2013 aan het firmament verschijnt zal mogelijk een spectaculair schouwspel opleveren. Dat hopen astronomen die de komeet C/2012 S1 vorige week ontdekten.
Russische astronomen fotografeerden de komeet vorige week in het sterrenbeeld Kreeft. Het object is nu nog een miljard kilometer van ons verwijderd en daardoor alleen met zeer sterke telescopen te vinden. Herfst volgend jaar zal daar echter verandering in komen.
Vanaf oktober 2013 zal de komeet net zichtbaar moeten zijn in de nachtelijke hemel. Naar mate hij dichter bij de zon komt, zal de komeet beter te zien zijn en mogelijk zelfs helderder worden dan de volle maan.
Staart
Als de zon het ijs van de komeet langzaam laat smelten, zal de komeet bovendien een staart krijgen die het geheel nog imposanter kan maken.
Uiteindelijk zal komeet rond 28 november langs de zon schieten en weer de ruimte in geslingerd worden. De aarde loopt volgens de ontdekkers geen gevaar.
Katten
Astronomen kunnen nog niet precies voorspellen hoe gedenkwaardig het fenomeen zal zijn. Dat hangt af van veel factoren, zoals de precieze baan en de snelheid waarmee het ijs smelt.
"Kometen zijn net katten", waarschuwt een expert. "Ze hebben een staart en ze doen wat ze willen."
Shoemaker Levy was ook erg spectaculair, misschien nog spectaculairder dan Hale Bopp, die viel op Jupiter. Kan me nog herinneren hoe we naar de Sterrenwacht in Eindhoven gingen, om het live mee te maken. Prachtige tijd was dat.
Good intentions and tender feelings may do credit to those who possess them, but they often lead to ineffective — or positively destructive — policies ... Kevin D. Williamson
Hale Bopp kan ik me nog wel herinneren maar dacht dat er onlangs ook eentje was die niet lang daarvoor pas was ontdekt. McNaaght ofzo?
McNaught werdt in 2006 ondekt.quote:
Hale Bopp kan ik me nog wel herinneren maar dacht dat er onlangs ook eentje was die niet lang daarvoor pas was ontdekt. McNaaght ofzo?
Maar de komeet die net voor de komst (1997)
van Hale-Bop werdt ontdekt heet Hyakutake - 1996
Maar ik hoop dat ISON net zoiets (of beter) wordt als McNaught
[ Bericht 2% gewijzigd door -CRASH- op 08-01-2013 20:44:58 ]
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Je ineens realiseren dat eind jaren '90 alweer 15 jaar geleden isquote:Op dinsdag 25 september 2012 17:39 schreef MPC60 het volgende:
[..]
Dat was toch eind jaren 90? Staat mij ook nog wel iets van bij.
En krijgen we een Sinterklaas en een kerst met een komeet aan de hemel !?!quote:COMET ISON APPROACHES:
Later this year, Comet ISON could put on an unforgettable display as it plunges toward the sun for a fiery encounter likely to turn the "dirty snowball" into a naked-eye object in broad daylight. At the moment, however, it doesn't look like much. John Chumack sends this picture, taken Jan. 8th, from his private observatory in Yellow Springs, Ohio:
"Comet ISON (C/2012 S1) is currently in the constellation Gemini, moving between the heads of the twins Castor and Pollux," says Chumack. "It is still pretty faint, near 16th magnitude, but don't be fooled by that. This could become one of the best comets in many years."
Comet ISON is a sungrazer. On Nov. 28, 2013, it will fly through the sun's outer atmosphere only 1.2 million km from the stellar surface below. If the comet survives the encounter, it could emerge glowing as brightly as the Moon, visible near the sun in the blue daylight sky. The comet's dusty tail stretching into the night would create a worldwide sensation.
Comet ISON looks so puny now because it is so far away, currently near the orbit of Jupiter. As it falls toward the sun in the months ahead it will warm up and reveal more about its true character. By the summer of 2013, researchers should know whether optimistic predictions about Comet ISON are justified. Possibilities range from "Comet of the Century" to disintegrated dud. Stay tuned!
http://www.spaceweather.com/
[ Bericht 0% gewijzigd door -CRASH- op 10-01-2013 11:17:28 ]
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Ik hoop zo dat ie het overleeftquote:The comet's dusty tail stretching into the night would create a worldwide sensation.
Lijkt me mooi om te zien
Is idd een pracht om te zien.. de laatste paar die ik gezien hebquote:
[..]
Ik hoop zo dat ie het overleeft
Lijkt me mooi om te zien
waren alleen maar met een kijker of fotografisch zichtbaar..
Ik zou de mogelijke zichtbare dag komeet wel mee willen maken
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quote:
Ik hoop zo dat ie het overleeft
Lijkt me mooi om te zien
Ben benieuwd, klein jaartje wachten dus.
Never in the entire history of calming down did anyone ever calm down after being told to calm down.
quote:Russian astronomers discover new huge comet
by Boris Pavlishchev and Alexei Lyakhov
Moscow (Voice of Russia) Jan 14, 2013
Last year, Russian astronomers Vitaly Nevsky and Artyom Novichonok discovered a new gigantic comet that is currently approaching Earth. The ISON comet, which is expected to become brighter than the full moon, will be visible to the naked eye by late 2013.
The astronomers say that given the comet's unique orbit, its origin may be the Oort Cloud, a cluster of frozen rocks and ices surrounding the solar system, located almost a light-year from the Sun.
The comet is currently passing outside Jupiter, gaining speed and becoming brighter by the day. In September 2012, the Russian astronomers spotted what appeared to be a comet in images taken by a telescope that is part of the worldwide International Scientific Optical Network, or ISON, from which the object draws its name.
Thanks to ISON, astronomers can get images taken by remote telescopes in other countries, including in New Mexico, where a Russian automatic observatory is located.
The ISON comet never plunged into the inner solar system, and its surface darkened because of the impact of galactic particles. At the same time, the comet avoided being damaged by the so-called solar wind, which is not the case for the Moon, for example.
Sergei Smirnov, press secretary of the Pulkovo Astronomical Observatory in Russia, says that studying surface of the ISON comet may shed more light on evolution of the Universe.
"In the future, it would be good to have special space vehicles on standby so that they can approach such celestial objects, something that may finally come true given the ongoing development of air navigation," Smirnov says.
Thus far, Comet ISON has only been visible through powerful telescopes. In November 2013, heat from the sun will vaporize ices in the comet's body, creating what could be a spectacular tail that will be visible in Earth's night sky without telescopes or even binoculars from about October 2013 through January 2014.
Another scenario is that Comet ISON could break apart as it nears the sun, failing to produce a tail of ice particles by the end of November. In December, the comet will be growing dimmer, but, assuming it is intact, it will be visible from both hemispheres of Earth.
January 2014 may see a meteor shower produced by streams of debris from the ISON comet.
Source: Voice of Russia
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COMET OF THE CENTURY?
Later this year, Comet ISON could become bright enough to see in broad daylight when it passes through the atmosphere of the sun. At the moment, however, it is a cold and lonely speck barely visible through backyard telescopes. Two nights ago, Pete Lawrence of Selsey, UK, photographed the potentially-great comet moving through space near the orbit of Jupiter:
"I created this animation using images taken through a 4-inch refractor, starting at 23h on the 15th of January and ending at 01h on the 16th," says Lawrence. "The comet is clearly visible moving among the stars of Gemini, in an area just to the south of Castor."
Comet ISON looks so puny now because it is more than 600 million km away. In late 2013, however, it will be much closer. A key date is Nov. 28th when Comet ISON flies through the solar corona only 1.2 million km from the surface of the sun. If the comet survives the encounter--a big IF--it could emerge glowing as brightly as the Moon with a sensational tail sure to create a worldwide sensation. Stay tuned!
www.spaceweather.com
Later this year, Comet ISON could become bright enough to see in broad daylight when it passes through the atmosphere of the sun. At the moment, however, it is a cold and lonely speck barely visible through backyard telescopes. Two nights ago, Pete Lawrence of Selsey, UK, photographed the potentially-great comet moving through space near the orbit of Jupiter:
"I created this animation using images taken through a 4-inch refractor, starting at 23h on the 15th of January and ending at 01h on the 16th," says Lawrence. "The comet is clearly visible moving among the stars of Gemini, in an area just to the south of Castor."
Comet ISON looks so puny now because it is more than 600 million km away. In late 2013, however, it will be much closer. A key date is Nov. 28th when Comet ISON flies through the solar corona only 1.2 million km from the surface of the sun. If the comet survives the encounter--a big IF--it could emerge glowing as brightly as the Moon with a sensational tail sure to create a worldwide sensation. Stay tuned!
www.spaceweather.com
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Starry Nightquote:
[..]
[ afbeelding ]
Ben benieuwd, klein jaartje wachten dus.
I feel kinda Locrian today
Omdat ISON nog zoooo ver weg is...
Komt er eentje voor een generale repetitie
INCOMING COMET:
In little more than a month, Comet PanSTARRS will cross the orbit of Mercury and probably brighten to naked-eye visibility as it absorbs the heat of the nearby sun. Sky watchers around the world will be looking for it in the sunset skies of early March, when it passes closest to the sun and to Earth. Until then a telescope is required; here is the view last night through a 0.3-meter-diameter reflector in Argentina:
A team of astronomers led by Martin Masek took the picture using the remotely-controlled F(/Ph)otometric Robotic Atmospheric Monitor--"FRAM" for short. "The stars are trailed in this 9x120s exposure, which tracked the comet," explains Masel.
Currently, the comet ranks about 8th magnitude, dimmer than the human eye can see, but it could brighten 100-fold on March 10th when it makes its closest approach to the sun (0.3 AU). The latest curves suggest that PanSTARRS will emerge glowing about as brightly as a 3rd magnitude star, similar to the stars in the Big Dipper.
There might, however, be surprises in store. Comet PanSTARRS has never been to inner solar system before. It is falling in from the Oort cloud, a great swarm of comets beyond Neptune and Pluto unaltered by the warmth of the sun. When Comet PanSTARRS dips it toe inside the orbit of Mercury for the first time, almost anything could happen ranging from an anticlimatic "bake-out" to a spectacular disruption. Stay tuned for updates.
3D Orbit
www.spaceweather.com
Komt er eentje voor een generale repetitie
INCOMING COMET:
In little more than a month, Comet PanSTARRS will cross the orbit of Mercury and probably brighten to naked-eye visibility as it absorbs the heat of the nearby sun. Sky watchers around the world will be looking for it in the sunset skies of early March, when it passes closest to the sun and to Earth. Until then a telescope is required; here is the view last night through a 0.3-meter-diameter reflector in Argentina:
A team of astronomers led by Martin Masek took the picture using the remotely-controlled F(/Ph)otometric Robotic Atmospheric Monitor--"FRAM" for short. "The stars are trailed in this 9x120s exposure, which tracked the comet," explains Masel.
Currently, the comet ranks about 8th magnitude, dimmer than the human eye can see, but it could brighten 100-fold on March 10th when it makes its closest approach to the sun (0.3 AU). The latest curves suggest that PanSTARRS will emerge glowing about as brightly as a 3rd magnitude star, similar to the stars in the Big Dipper.
There might, however, be surprises in store. Comet PanSTARRS has never been to inner solar system before. It is falling in from the Oort cloud, a great swarm of comets beyond Neptune and Pluto unaltered by the warmth of the sun. When Comet PanSTARRS dips it toe inside the orbit of Mercury for the first time, almost anything could happen ranging from an anticlimatic "bake-out" to a spectacular disruption. Stay tuned for updates.
3D Orbit
www.spaceweather.com
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En nog een komeet.....
GREEN COMET LEMMON:
2013 could be the Year of the Comet. Comet Pan-STARRS is set to become a naked eye object in march, followed by possibly-Great Comet ISON in November. Now we must add to that list green Comet Lemmon (C/2012 F6). "Comet Lemmon is putting on a great show for us down in the southern hemisphere," reports John Drummond, who sends this picture from Gisborne, New Zealand
"I took the picture on Jan. 23rd using a 41 cm (16 in) Meade reflector," says Drummond. "It is a stack of twenty 1 minute exposures." That much time was required for a good view of the comet's approximately 7th-magnitude coma ("coma"=cloud of gas surrounding the comet's nucleus).
Lemmon's green color comes from the gases that make up its coma. Jets spewing from the comet's nucleus contain cyanogen (CN: a poisonous gas found in many comets) and diatomic carbon (C2). Both substances glow green when illuminated by sunlight in the near-vacuum of space.
Discovered on March 23rd 2012 by the Mount Lemmon survey in Arizona, Comet Lemmon is on an elliptical orbit with a period of almost 11,000 years. This is its first visit to the inner solar system in a very long time.
The comet is brightening as it approaches the sun; light curves suggest that it will reach 2nd or 3rd magnitude, similar to the stars in the Big Dipper, in late March when it approaches the sun at about the same distance as Venus (0.7 AU). Northern hemisphere observers will get their first good look at the comet in early April; until then it is a target exclusively for astronomers in the southern hemisphere.
Het traject dat de komeet aflegt vanaf April. Dan is ie interressant voor het nooerdelijk halfrond
[ Bericht 5% gewijzigd door -CRASH- op 28-01-2013 17:39:15 ]
GREEN COMET LEMMON:
2013 could be the Year of the Comet. Comet Pan-STARRS is set to become a naked eye object in march, followed by possibly-Great Comet ISON in November. Now we must add to that list green Comet Lemmon (C/2012 F6). "Comet Lemmon is putting on a great show for us down in the southern hemisphere," reports John Drummond, who sends this picture from Gisborne, New Zealand
"I took the picture on Jan. 23rd using a 41 cm (16 in) Meade reflector," says Drummond. "It is a stack of twenty 1 minute exposures." That much time was required for a good view of the comet's approximately 7th-magnitude coma ("coma"=cloud of gas surrounding the comet's nucleus).
Lemmon's green color comes from the gases that make up its coma. Jets spewing from the comet's nucleus contain cyanogen (CN: a poisonous gas found in many comets) and diatomic carbon (C2). Both substances glow green when illuminated by sunlight in the near-vacuum of space.
Discovered on March 23rd 2012 by the Mount Lemmon survey in Arizona, Comet Lemmon is on an elliptical orbit with a period of almost 11,000 years. This is its first visit to the inner solar system in a very long time.
The comet is brightening as it approaches the sun; light curves suggest that it will reach 2nd or 3rd magnitude, similar to the stars in the Big Dipper, in late March when it approaches the sun at about the same distance as Venus (0.7 AU). Northern hemisphere observers will get their first good look at the comet in early April; until then it is a target exclusively for astronomers in the southern hemisphere.
Het traject dat de komeet aflegt vanaf April. Dan is ie interressant voor het nooerdelijk halfrond
[ Bericht 5% gewijzigd door -CRASH- op 28-01-2013 17:39:15 ]
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Ik zat m'n foto CDs na te kijken
En daar heb me toch 2 foto's van
Hale-Bopp (April 1997) gevonden.
Het zijn geen parels van foto's
En daar heb me toch 2 foto's van
Hale-Bopp (April 1997) gevonden.
Het zijn geen parels van foto's
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COMET LEMMON UPDATE:
Glowing much brighter than expected, Comet Lemmon (C/2012 F6) is gliding through the skies of the southern hemisphere about 92 million miles (0.99 AU) from Earth. Amateur astronomer Rolf Wahl Olsen sends this picture from his backyard in Auckland, New Zealand:
"I took this image of Comet Lemmon on the 28th of January," says Olsen. "It has become quite bright now and has also grown a beautiful tail."
Discovered on March 23rd 2012 by the Mount Lemmon survey in Arizona, Comet Lemmon is on an elliptical orbit with a period of almost 11,000 years. This is its first visit to the inner solar system in a very long time. The comet is brightening as it approaches the sun; light curves suggest that it will reach 2nd or 3rd magnitude, similar to the stars in the Big Dipper, in late March when it approaches the sun at about the same distance as Venus (0.7 AU).
At the moment, the comet is glowing like a 7th magnitude star, just below the limit of naked-eye visibility. To capture the faint details of the comet's filamentary tail, Olsen used a 10-inch telescope, a sensitive CCD camera, and an exposure time of 1 hour 17 minutes. Complete photo details are given here.
Lemmon's green color comes from the gases that make up its coma. Jets spewing from the comet's nucleus contain cyanogen (CN: a poisonous gas found in many comets) and diatomic carbon (C2). Both substances glow green when illuminated by sunlight in the near-vacuum of space.
Northern hemisphere observers will get their first good look at the comet in early April; until then it is a target exclusively for astronomers in the southern hemisphere.
Glowing much brighter than expected, Comet Lemmon (C/2012 F6) is gliding through the skies of the southern hemisphere about 92 million miles (0.99 AU) from Earth. Amateur astronomer Rolf Wahl Olsen sends this picture from his backyard in Auckland, New Zealand:
"I took this image of Comet Lemmon on the 28th of January," says Olsen. "It has become quite bright now and has also grown a beautiful tail."
Discovered on March 23rd 2012 by the Mount Lemmon survey in Arizona, Comet Lemmon is on an elliptical orbit with a period of almost 11,000 years. This is its first visit to the inner solar system in a very long time. The comet is brightening as it approaches the sun; light curves suggest that it will reach 2nd or 3rd magnitude, similar to the stars in the Big Dipper, in late March when it approaches the sun at about the same distance as Venus (0.7 AU).
At the moment, the comet is glowing like a 7th magnitude star, just below the limit of naked-eye visibility. To capture the faint details of the comet's filamentary tail, Olsen used a 10-inch telescope, a sensitive CCD camera, and an exposure time of 1 hour 17 minutes. Complete photo details are given here.
Lemmon's green color comes from the gases that make up its coma. Jets spewing from the comet's nucleus contain cyanogen (CN: a poisonous gas found in many comets) and diatomic carbon (C2). Both substances glow green when illuminated by sunlight in the near-vacuum of space.
Northern hemisphere observers will get their first good look at the comet in early April; until then it is a target exclusively for astronomers in the southern hemisphere.
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COMET ISON SPROUTS A TAIL:
Comet ISON, which is plunging toward the sun for a bright and fiery encounter in late 2013, has just sprouted a tail. It's not much--yet--but that is because the comet is still in deep space near the orbit of Jupiter. On. Feb. 3rd, amateur astronomer Rolando Ligustri photographed the development using a robotic telescope in New Mexico:
klikbaar
Comet ISON doesn't look very impressive now as it glides through the cold vacuum more than 600,000 km from Earth, but its appearance will improve later this year. On Nov. 28th, ISON is going to glide through the sun's atmosphere only 1.1 million km above the stellar surface. It could emerge from the encounter glowing as brightly as the full Moon, visible in broad daylight near the sun. If so, today's budding tail would likely grow into a garish appendage that wows observers in both hemispheres--no telescope required. Stay tuned for updates.
Update:
NASA's Deep Impact spacecraft has also observed Comet ISON's sprouting tail.
Click here for a video.
www.spaceweather.com
Comet ISON, which is plunging toward the sun for a bright and fiery encounter in late 2013, has just sprouted a tail. It's not much--yet--but that is because the comet is still in deep space near the orbit of Jupiter. On. Feb. 3rd, amateur astronomer Rolando Ligustri photographed the development using a robotic telescope in New Mexico:
klikbaar
Comet ISON doesn't look very impressive now as it glides through the cold vacuum more than 600,000 km from Earth, but its appearance will improve later this year. On Nov. 28th, ISON is going to glide through the sun's atmosphere only 1.1 million km above the stellar surface. It could emerge from the encounter glowing as brightly as the full Moon, visible in broad daylight near the sun. If so, today's budding tail would likely grow into a garish appendage that wows observers in both hemispheres--no telescope required. Stay tuned for updates.
Update:
NASA's Deep Impact spacecraft has also observed Comet ISON's sprouting tail.
Click here for a video.
www.spaceweather.com
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COMET PAN-STARRS UPDATE:
Comet Pan-STARRS (C/2011 L4), widely expected to become a naked-eye object in early March, is now closer to the sun than Venus. Solar heating is vaporizing the comet's icy core and creating a wide, fan-shaped tail visible through binoculars in the southern hemisphere. Ignacio Diaz Bobillo sends this picture from Buenos Aires, Argentina:
"I saw Comet Pan-STARRS just before daybreak in the constellation Grus," says Bobillo. "This is what it looked like through a small telescope, imaged with an exposure time of 8x2 minutes."
In early March, Comet Pan-STARRS will make its closest approach to the sun inside the orbit of Mercury; at that time it could brighten to easy naked-eye visibility. No one knows exactly what will happen, however, because it is a fresh comet being exposed to solar heating for the first time. Experts discuss the possibilities in this video from Science@NASA.
More:
3D orbit,
ephemeris,
light curves,
NASA story.
Comet Pan-STARRS (C/2011 L4), widely expected to become a naked-eye object in early March, is now closer to the sun than Venus. Solar heating is vaporizing the comet's icy core and creating a wide, fan-shaped tail visible through binoculars in the southern hemisphere. Ignacio Diaz Bobillo sends this picture from Buenos Aires, Argentina:
"I saw Comet Pan-STARRS just before daybreak in the constellation Grus," says Bobillo. "This is what it looked like through a small telescope, imaged with an exposure time of 8x2 minutes."
In early March, Comet Pan-STARRS will make its closest approach to the sun inside the orbit of Mercury; at that time it could brighten to easy naked-eye visibility. No one knows exactly what will happen, however, because it is a fresh comet being exposed to solar heating for the first time. Experts discuss the possibilities in this video from Science@NASA.
More:
3D orbit,
ephemeris,
light curves,
NASA story.
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Two comets - C/2012 F6 (Lemmon) and C/2011 L4 (PanSTARRS)
can be seen moving through the Southern Sky in this short time lapse video.
Hopefully comet PanSTARRS brightens up significantly before moving into
the Northern Hemisphere sky.
For more images and videos go to my blog terrastro.com
Alex Cherney
can be seen moving through the Southern Sky in this short time lapse video.
Hopefully comet PanSTARRS brightens up significantly before moving into
the Northern Hemisphere sky.
For more images and videos go to my blog terrastro.com
Alex Cherney
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Wat zou het vet zijn als dit ding zo helder wordt als mogelijk is, al heb ik begrepen dat helderheid van kometen uitzonderlijk moeilijk te voorspellen is.
Nog anderhalve weekquote:Op zaterdag 23 februari 2013 12:41 schreef Tchock het volgende:
Wat zou het vet zijn als dit ding zo helder wordt als mogelijk is, al heb ik begrepen dat helderheid van kometen uitzonderlijk moeilijk te voorspellen is.
en we zien het resultaat hoe helder PanSTARRS wordt
En hoe helder het weer wordt.
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Vanaf 7 maart is komeet PanSTARRS te zien aan de avondhemel 
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COMET PAN-STARRS UPDATE:
Comet Pan-STARRS, now visible in the southern hemispherre, is brightening as it plunges toward the sun, Amateur astronomer Ian Cooper sends this report from Glen Oroua, New Zealand: "Despite lingering evening twilight and the glare from a nearly full Moon, Comet Pan-STARRS is a 3rd-magnitude object with a fine orange dust tail visible in both binoculars and small telescopes." A 30-second exposure with his Canon 450D digital camera easily revealed the comet in the not-quite-dark sky:
Realtime Comet Photo Gallery
In early March, the comet will pass about 100 million miles from Earth as it briefly dips inside the orbit of Mercury. At that time it is expected to brighten another three-fold to 2nd magnitude, about as bright as the stars in the Big Dipper. Whether Pan-STARRS will actually be visible to the naked eye through the glow of the nearby sun remains to be seen. Whatever happens, observers in the northern hemisphere will have a front row seat as the comet crosses the celestial equator on March 12th. Stay tuned!
[ Bericht 4% gewijzigd door -CRASH- op 28-02-2013 19:41:27 ]
Comet Pan-STARRS, now visible in the southern hemispherre, is brightening as it plunges toward the sun, Amateur astronomer Ian Cooper sends this report from Glen Oroua, New Zealand: "Despite lingering evening twilight and the glare from a nearly full Moon, Comet Pan-STARRS is a 3rd-magnitude object with a fine orange dust tail visible in both binoculars and small telescopes." A 30-second exposure with his Canon 450D digital camera easily revealed the comet in the not-quite-dark sky:
Realtime Comet Photo Gallery
In early March, the comet will pass about 100 million miles from Earth as it briefly dips inside the orbit of Mercury. At that time it is expected to brighten another three-fold to 2nd magnitude, about as bright as the stars in the Big Dipper. Whether Pan-STARRS will actually be visible to the naked eye through the glow of the nearby sun remains to be seen. Whatever happens, observers in the northern hemisphere will have a front row seat as the comet crosses the celestial equator on March 12th. Stay tuned!
[ Bericht 4% gewijzigd door -CRASH- op 28-02-2013 19:41:27 ]
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ja awesome deze komeet, hopelijk kunnen we hem zien met helder weer rond 12 maart, hoop dat het lukt om met 300mm lens hem op de korrel te nemen
<hr>
BRIGHT COMET PAN-STARRS:
Comet Pan-STARRS (C/2011 L4) is now inside the orbit of Mercury, brightening as it plunges toward the sun. Observers in the southern hemisphere report say they can see Pan-STARRS with the unaided eye in the evening sunset sky. Carl Gruber photographed the comet on March 2nd over the city lights of Melbourne, Australia:
"Despite bad light and smog pollution, the comet's nucleus was clearly visible to the naked eye as well as a small part of the tail," says Gruber. Light curves show the comet is approaching 2nd magnitude, about as bright as the stars of the Big Dipper.
Several important dates are approaching. On March 5th, Comet Pan-STARRS makes its closest approach to Earth (1.09 AU), followed on March 10th by its closest approach to the sun (0.3 AU). As Comet Pan-STARRS passes the sun, solar glare will make it difficult to see even as the nucleus vaporizes and brightens. By March 12th and 13th, the comet will reappear in the sunset skies of the northern hemisphere not far from the crescent Moon; think photo-op! Check the Realtime Comet Photo Gallery for the latest images.
Comet Pan-STARRS (C/2011 L4) is now inside the orbit of Mercury, brightening as it plunges toward the sun. Observers in the southern hemisphere report say they can see Pan-STARRS with the unaided eye in the evening sunset sky. Carl Gruber photographed the comet on March 2nd over the city lights of Melbourne, Australia:
"Despite bad light and smog pollution, the comet's nucleus was clearly visible to the naked eye as well as a small part of the tail," says Gruber. Light curves show the comet is approaching 2nd magnitude, about as bright as the stars of the Big Dipper.
Several important dates are approaching. On March 5th, Comet Pan-STARRS makes its closest approach to Earth (1.09 AU), followed on March 10th by its closest approach to the sun (0.3 AU). As Comet Pan-STARRS passes the sun, solar glare will make it difficult to see even as the nucleus vaporizes and brightens. By March 12th and 13th, the comet will reappear in the sunset skies of the northern hemisphere not far from the crescent Moon; think photo-op! Check the Realtime Comet Photo Gallery for the latest images.
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STEREO-B SEES COMET PAN-STARRS:
On March 10th, Comet Pan-STARRS passed by the sun just inside the orbit of Mercury. The close encounter brought it into the field of view of NASA's STEREO-B spacecraft. The sun, Earth, and comet are labeled in this low-resolution beacon image from STEREO-B's Heliospheric Imager:
Comet Pan-STARRS is so bright, it is actually saturating the pixels of the imager's digital camera. The comet's luminosity is mainly due to dust. Earth-based observations show that Pan-STARRS is dustier than an average comet. Comet dust reflects sunlight, so the fan-shaped tail of Pan-STARRS, chock full of it, is especially bright.
Low-resolution beacon images will be followed in a day or so by high-resolution movies. Stay tuned for a great view of Comet Pan-STARRS passing the sun.
On March 10th, Comet Pan-STARRS passed by the sun just inside the orbit of Mercury. The close encounter brought it into the field of view of NASA's STEREO-B spacecraft. The sun, Earth, and comet are labeled in this low-resolution beacon image from STEREO-B's Heliospheric Imager:
Comet Pan-STARRS is so bright, it is actually saturating the pixels of the imager's digital camera. The comet's luminosity is mainly due to dust. Earth-based observations show that Pan-STARRS is dustier than an average comet. Comet dust reflects sunlight, so the fan-shaped tail of Pan-STARRS, chock full of it, is especially bright.
Low-resolution beacon images will be followed in a day or so by high-resolution movies. Stay tuned for a great view of Comet Pan-STARRS passing the sun.
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Ik heb net even gekeken maar ik kon hem niet zien/vinden :|
Morgen nog maar eens proberen.
Iemand hier die hem wel gezien heeft?
Morgen nog maar eens proberen.
Iemand hier die hem wel gezien heeft?
The machine was called Chronovisor, and could allegedly allow seeing and hearing events from the past.
Hier (Oegstgeest) ook niets. 
Op donderdag 6 september 2012 @ 21:41 schreef Shakkara het volgende:
Uiteraard is het volgens Rutte en consorten de schuld van een imaginair links kabinet dat we ooit ergens in het verleden gehad schijnen te hebben.
Uiteraard is het volgens Rutte en consorten de schuld van een imaginair links kabinet dat we ooit ergens in het verleden gehad schijnen te hebben.
Nope...
De laatste wolken waren niet snel genoeg weg.
De laatste wolken waren niet snel genoeg weg.
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Dat lag dus niet aan mij.quote:
Ik kon de maan niet eens vinden (en ja, ik heb in de goede richting gekeken met vrij zicht...).
Ik kon die maan ook niet vinden.
IK HEB EM....
Door stom toeval toch op de foto.
Al is het niet de foto waar ik em op verwacht had
Het is geen super kwaliteit...
Moest flink de foto inzoomen...
En toen zag ik iets...
Vier dubbel gecheckt of het geen contrail of zoiets was.
hoop dat ie te zien is
Door stom toeval toch op de foto.
Al is het niet de foto waar ik em op verwacht had
Het is geen super kwaliteit...
Moest flink de foto inzoomen...
En toen zag ik iets...
Vier dubbel gecheckt of het geen contrail of zoiets was.
hoop dat ie te zien is
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Kewl!quote:
IK HEB EM....
Door stom toeval toch op de foto.
Al is het niet de foto waar ik em op verwacht had
Het is geen super kwaliteit...
Moest flink de foto inzoomen...
En toen zag ik iets...
Vier dubbel gecheckt of het geen contrail of zoiets was.
hoop dat ie te zien is
[ afbeelding ]
Hoe laat was dat?
Free Assange! Hack the Planet
[b]Op dinsdag 6 januari 2009 19:59 schreef Papierversnipperaar het volgende:[/b]
De gevolgen van de argumenten van de anti-rook maffia
[b]Op dinsdag 6 januari 2009 19:59 schreef Papierversnipperaar het volgende:[/b]
De gevolgen van de argumenten van de anti-rook maffia
19:48quote:
Op Ik heb em gevonden doordat ik het kaartje erbij gepakt heb
om te zien waar ie ongeveer moest zijn.
De positie waar de zon onderging wist ik en heb het zo terug getraceerd
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Vanavond en gister avond gelukt om hem op de foto te krijgen. Niet te zien met het blote oog dus geen zoom foto's kunnen maken.
Voorheen Post ID 101472
Volgens het plaatje hierboven 270 graden, dus pal naar het westen.quote:Op woensdag 13 maart 2013 14:43 schreef Nemephis het volgende:
n00b-vraag: In welke richting moet je kijken om dat ding te zien?
Op dinsdag 23 augustus 2011 23:18 schreef problematiQue het volgende:
Mensen die zomaar claimen dat A beter is dan B moet je gewoon negeren. Internetruis.
Mensen die zomaar claimen dat A beter is dan B moet je gewoon negeren. Internetruis.
Heb je (w)(m)eer geluk gehad dan mijquote:
Vanavond en gister avond gelukt om hem op de foto te krijgen. Niet te zien met het blote oog dus geen zoom foto's kunnen maken.
[ afbeelding ]
De maan kon ik heel goed zien maar
een stuk eronder zat een hele lange
gesloten wolkenband
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Zelfs met de verrekijker lukt het mij niet, alleen met lange belichting zichtbaar op de foto (2-4 sec.)
Voorheen Post ID 101472
Gevonden met de verrekijker! En als er geen lantaarnpaaal in de buurt stond vast ook wel met hel blote oog. Foto's kunnen maken @400mm. Helaas wel tussen de takken door, maar er zitten vast een paar goede tussen.
Voorheen Post ID 101472
Er waren veel vlietuigen aan de horizon
En veel sluierbewolking
Maar een komeet
En veel sluierbewolking
Maar een komeet
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hoe laat?
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quote:
Mooie afbeelding en timelaps Estate2!
Ben benieuwd hoe Panstarrs zich verhoudt met ISON. Die zou toch vele malen groter en helderder moeten worden?
Ben benieuwd hoe Panstarrs zich verhoudt met ISON. Die zou toch vele malen groter en helderder moeten worden?
![[Updated] Comet C/2011 L4 (PanSTARRS) in STEREO HI-1B](http://i.ytimg.com/vi/reizDW0Y-Rk/default.jpg)
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ISON zou -3 tot -4 gaan in november dit jaar volgens de huidige voorspelling. Theoretisch zichtbaar overdag dus.quote:
Ben benieuwd hoe Panstarrs zich verhoudt met ISON. Die zou toch vele malen groter en helderder moeten worden?
Panstarrs is nu geschat +0,2 en verschikkelijk groot verschil dus.
Het ISS komt wel eens over met een magnitude van -3,7 en dat is niet te missen, zelfs niet tijdens de schemering. Als je de baan en het tijdstip weet kun je hem zelfs overdag vinden. Ik heb hem een paar keer in de namiddag over zien komen.
ISON zal in november hier laat in de nacht, begin ochtend te zien moeten zijn.
–4.00 Faintest objects observable during the day with naked eye when Sun is high
–3.82 Minimum brightness of Venus when it is on the far side of the Sun
–2.94 Maximum brightness of Jupiter
–2.91 Maximum brightness of Mars
Voorheen Post ID 101472
awesome!quote:
Vanavond en gister avond gelukt om hem op de foto te krijgen. Niet te zien met het blote oog dus geen zoom foto's kunnen maken.
[ afbeelding ]
<hr>
nerdgasm! <3quote:
<hr>
The difference between the three Abrahamic religions:
- Christianity mumbling to the ceiling,
- Judaism mumbling to the wall,
- Islam mumbling to the floor.
- Christianity mumbling to the ceiling,
- Judaism mumbling to the wall,
- Islam mumbling to the floor.
IS COMET PAN-STARRS FRAGMENTING?
Veteran astrophotographer Peter Rosen has been monitoring Comet Pan-STARRS, and his latest images obtained on March 15th seem to show a fragment emerging from the nucleus. It is the speck just below and to the right of the comet's head.
"It is visible also in two or three other image stacks," says Rosen. He notes how the stars in the image are trailed, but the apparent fragment is not. "It seems to follow the comet, not the stars. A plane passed through the field of view during the exposure, making a red streak through the comet's tail."
"The colorful image is a frequency modulation that increases the contrast and clearly shows the fragment as a dark dot below the nucleus," he continues. "I hope this splitting can be confirmed or refuted soon by other observers."
For casual sky watchers: A growing number of people are reporting that they can see Comet Pan-STARRS with the naked eye. Best estimates place the magnitude of the comet at +0.2, about twice as bright as a 1st magnitude star. As the comet moves away from the sun, its visibility is improving, which means you might be able to see it in the nights ahead. Step outside about an hour after sunset and look west:
Veteran astrophotographer Peter Rosen has been monitoring Comet Pan-STARRS, and his latest images obtained on March 15th seem to show a fragment emerging from the nucleus. It is the speck just below and to the right of the comet's head.
"It is visible also in two or three other image stacks," says Rosen. He notes how the stars in the image are trailed, but the apparent fragment is not. "It seems to follow the comet, not the stars. A plane passed through the field of view during the exposure, making a red streak through the comet's tail."
"The colorful image is a frequency modulation that increases the contrast and clearly shows the fragment as a dark dot below the nucleus," he continues. "I hope this splitting can be confirmed or refuted soon by other observers."
For casual sky watchers: A growing number of people are reporting that they can see Comet Pan-STARRS with the naked eye. Best estimates place the magnitude of the comet at +0.2, about twice as bright as a 1st magnitude star. As the comet moves away from the sun, its visibility is improving, which means you might be able to see it in the nights ahead. Step outside about an hour after sunset and look west:
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Pan-STARRS more photogenic
As it emerges from the glare of the evening sun, Comet Pan-STARRS is becoming even more photogenic. Last night, March 17th, Alan Dyer caught it setting behind the Very Large Array, a radio telescope in Socorro, New Mexico:
Movie-goers will remember seeing the VLA in Carl Sagan's movie Contact starring Jodie Foster. Among astronomers, the array is even more famous for real-life scientific discoveries. On March 17th, the great telescope was window dressing for a comet.
"Light from the nearly quarter Moon high in the sky illuminated the landscape and highlighted the rims of the 27 dishes of the VLA," says Dyer. "Fortunately, the array was arranged in its most compact formationfor easy photography – at times the dishes can be spread out over many miles."
"The comet appeared in deep twilight," he continues. "A classic curving dust tail is now obvious in photos. This comet will bear watching and shooting over the next month, no matter where you are in the northern hemisphere."
For casual sky watchers: A growing number of people are reporting that they can see Comet Pan-STARRS with the naked eye. Best estimates place the magnitude of the comet at +0.2, about twice as bright as a 1st magnitude star. As the comet moves away from the sun, its visibility is improving. Observing tip: Step outside about an hour after sunset and face west. Pinpoint the comet using binoculars. Once you know where to look, put the optics aside and try some naked-eye observing.
Bron
As it emerges from the glare of the evening sun, Comet Pan-STARRS is becoming even more photogenic. Last night, March 17th, Alan Dyer caught it setting behind the Very Large Array, a radio telescope in Socorro, New Mexico:
Movie-goers will remember seeing the VLA in Carl Sagan's movie Contact starring Jodie Foster. Among astronomers, the array is even more famous for real-life scientific discoveries. On March 17th, the great telescope was window dressing for a comet.
"Light from the nearly quarter Moon high in the sky illuminated the landscape and highlighted the rims of the 27 dishes of the VLA," says Dyer. "Fortunately, the array was arranged in its most compact formationfor easy photography – at times the dishes can be spread out over many miles."
"The comet appeared in deep twilight," he continues. "A classic curving dust tail is now obvious in photos. This comet will bear watching and shooting over the next month, no matter where you are in the northern hemisphere."
For casual sky watchers: A growing number of people are reporting that they can see Comet Pan-STARRS with the naked eye. Best estimates place the magnitude of the comet at +0.2, about twice as bright as a 1st magnitude star. As the comet moves away from the sun, its visibility is improving. Observing tip: Step outside about an hour after sunset and face west. Pinpoint the comet using binoculars. Once you know where to look, put the optics aside and try some naked-eye observing.
Bron
quote:
02-04-2013
NASA meet ‘komeet van de eeuw’ C/2012 ISON op
[ afbeelding ]
NASA heeft de komeet C/2012 (ISON) opgemeten. De komeet – die in november van dit jaar wel eens een spectaculaire show kan gaan weergeven en dan mogelijk zelfs overdag vanaf de aarde zichtbaar is – lijkt een kern van zo’n vijf kilometer breed te hebben.
Dat blijkt uit foto’s die de SWIFT-satelliet van de komeet heeft gemaakt. De doorsnede van vijf kilometer is niet zo heel verrassend: de meeste kometen beschikken over een kern van ongeveer deze grootte.
Materiaal
SWIFT bestudeerde niet alleen de kern van ISON. De satelliet achterhaalde ook hoeveel materiaal de komeet op dit moment verliest. De observaties wijzen erop dat het om zo’n 51.000 kilo stof per minuut gaat. Ook verliest de komeet ongeveer 60 kilo water per minuut.
Erosie Zoals gezegd verliest de komeet zodra deze de zon nadert flink wat stof en water. Maar blijft er dan nog wel iets van de komeet over? De onderzoekers denken van wel. “We schatten dat ongeveer tien procent van de diameter van de komeet erodeert, maar waarschijnlijk zal deze niet vernietigd worden,” stelt Knight.November
Op het moment dat SWIFT de komeet bestudeerde, bevond deze zich op zo’n 604 miljoen kilometer van de aarde en ongeveer 740 miljoen kilometer van de zon. Tegen het eind van dit jaar – op 28 november, om precies te zijn – zal de komeet de zon van een stukje dichterbij gaan bekijken. De komeet nadert het zichtbare oppervlak van de zon dan tot zo’n 1,2 miljoen kilometer. Doordat de komeet dan zo dicht bij de zon in de buurt komt, zal het oppervlak eroderen en flink wat meer stof loslaten dan nu het geval is. Tegelijkertijd verliest de komeet door toedoen van de hitte van de zon ook veel meer water. Onderzoekers verwachten dat de komeet rond deze tijd ook goed zichtbaar is vanaf de aarde. De komeet zou dan wellicht zo helder zijn dat deze met het blote oog te zien is.
Prestatie
Op dit moment wordt de komeet al steeds helderder. De grote vraag is echter of deze ook de komende maanden – wanneer de komeet steeds dichter bij de zon in de buurt komt en steeds meer water verliest – helderder zal worden. “Het ziet er veelbelovend uit, maar dat is het enige wat we nu met zekerheid kunnen zeggen,” vertelt onderzoeker Matthew Knight. “Voorgaande kometen konden niet langer aan de verwachtingen voldoen zodra ze het hart van het zonnestelsel bereikten.” De onderzoekers houden de komeet ook de komende maanden goed in de gaten. “De observaties van de komende maanden zullen ons een beter beeld geven van hoe ISON zal gaan presteren.”
Op 1 oktober van dit jaar scheert de komeet redelijk dicht langs Mars (op zo’n 10,8 miljoen kilometer afstand). De onderzoekers hopen dan een goed beeld van de komeet te krijgen. “Persoonlijk hoop ik op prachtige foto’s van Curiosity,” vertelt onderzoeker Michael Kelley.
(scientias.nl)
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Oeh, mooi, ik herinner me een komeet een jaar of 25 terug die je zelfs in de stad met het blote ook kon zien. Als deze net zo, of nog helderder wordtquote:
In Baden-Badener Badeseen kann man Baden-Badener baden sehen.
De beroemste van allemaal Halley's comet 1988quote:
[..]
Oeh, mooi, ik herinner me een komeet een jaar of 25 terug die je zelfs in de stad met het blote ook kon zien. Als deze net zo, of nog helderder wordt
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Had ik het nog goed ook met 25 jaar. Maar goed, zou deze weer net zo helder worden?quote:
[..]
De beroemste van allemaal Halley's comet 1988
In Baden-Badener Badeseen kann man Baden-Badener baden sehen.
Ison zou mogelijk eentje zijn die je overdag kunt zien.quote:
[..]
Had ik het nog goed ook met 25 jaar. Maar goed, zou deze weer net zo helder worden?
Maar je kunt niet eigenlijk nog niks over de helderheid zeggen.
Want dat is niet te voorspellen. Het is dus gewoon afwachten
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Of de postcode van Greater Manchesterquote:
Zeg dan gewoon Andromeda, in plaats van een of andere snelweg in Engeland.
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'86.quote:
[..]
De beroemste van allemaal Halley's comet 1988
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MAGNIFICENT COMET TAIL:
This week, Earth passed through the orbital plane of Comet Pan-Starrs.
This allowed observers to see the comet's fan-shaped tail edge on.
Veteran astrophotographer Chris Schur of Payson, Arizona, judged it
"the finest long anti-tail we have ever imaged in the past 35 years of comet photography!"
This picture, taken by Pete Lawrence of Selsey UK, shows less than half of the comet's tail;
click on the image to see the rest:
"Wow - as Earth crossed the orbital plane of comet C/2011 L4 PANSTARRS,
the comet's orbital plane spike or 'anti-tail' became very impressive, stretching
for more than 7 degrees across the sky," says Lawrence.
The narrow linear structure is called an anti-tail because it points toward the sun,
opposite the usual direction of comet tails. In fact, this is an artifact of the viewing
geometry. Gas and dust evaporating from the comet is not being sucked back toward the sun.
Amateur astronomers with mid-sized backyard telescopes can see the anti-tail for themselves.
Comet Pan-Starrs is shining like a 9th magnitude star not far from Polaris, the North Star.
This week, Earth passed through the orbital plane of Comet Pan-Starrs.
This allowed observers to see the comet's fan-shaped tail edge on.
Veteran astrophotographer Chris Schur of Payson, Arizona, judged it
"the finest long anti-tail we have ever imaged in the past 35 years of comet photography!"
This picture, taken by Pete Lawrence of Selsey UK, shows less than half of the comet's tail;
click on the image to see the rest:
"Wow - as Earth crossed the orbital plane of comet C/2011 L4 PANSTARRS,
the comet's orbital plane spike or 'anti-tail' became very impressive, stretching
for more than 7 degrees across the sky," says Lawrence.
The narrow linear structure is called an anti-tail because it points toward the sun,
opposite the usual direction of comet tails. In fact, this is an artifact of the viewing
geometry. Gas and dust evaporating from the comet is not being sucked back toward the sun.
Amateur astronomers with mid-sized backyard telescopes can see the anti-tail for themselves.
Comet Pan-Starrs is shining like a 9th magnitude star not far from Polaris, the North Star.
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quote:Hubble Space Telescope snaps first pictures of super-fast Comet ISON
July 4, 2013 – SPACE - The Comet ISON shines like a cosmic skyrocket in a new video from the Hubble Space Telescope as the icy wanderer, which some astronomers have billed as a potential “comet of the century,” streaks through our solar system at a staggering 48,000 mph. The new Comet ISON video, which NASA released Tuesday (July 2), is a time-lapse view created from images of the comet obtained using the Hubble telescope on May 8. At the time, the comet was about 403 million miles (648 million kilometers) from Earth and crossing between the orbits of Jupiter and Mars. NASA officials likened the comet’s extreme speed to a skyrocket on the Fourth of July. “The movie shows a sequence of Hubble observations taken over a 43-minute span and compresses this into just five seconds,” NASA officials explained in a video description. “The comet travels 34,000 miles in this brief video, or 7 percent of the distance between Earth and the moon. The deep-space visitor streaks silently against the background stars.” The blue hue of ISON in the new video is actually a false-color view of the comet as it appeared through the Wide Field Camera 3 on the Hubble Space Telescope. Comet ISON was discovered by amateur astronomers in September 2012 and is headed for a close encounter with the sun in late November of this year.
The comet’s swing through the inner solar system is much anticipated by professional and amateur astronomers because of its extremely close approach to the sun. On Nov. 28, Comet ISON will swing within 800,000 miles (1.2 million km) of the sun’s surface. That close encounter could cause the comet to flare up into a brilliant night sky sight visible to the unaided eye by November. But the comet could also fizzle out in a fabulous bust, so NASA scientists and astronomers around the world are keeping a close watch on Comet ISON to see if it lives up to its hype. While NASA has likened Comet ISON to a cosmic firework in the new Hubble video, the comet itself is not exploding. “Its skyrocket-looking tail is really a streamer of gas and dust bleeding off the icy nucleus, which is surrounded by a bright star-like-looking coma,” NASA officials wrote. “The pressure of the solar wind sweeps the material into a tail, like a breeze blowing a windsock.” As the comet zooms closer to the sun and warms up, it is expected to grow, NASA officials added. ISON’s tail will also grow longer over time. In April, Comet ISON’s tail stretched across 57,000 miles (92,000 km) in images snapped by the Hubble Space Telescope. At the time, the comet’s nucleus was estimated to be about 4 miles (6.5 km) across. Because of ISON’s potential to be a spectacular night sky object, NASA and astronomers around the world have assembled a Comet ISON Observing Campaign to track the object’s progress across the solar system
Misschien heb ik het al gemist maar rond wanneer weten we of deze komeet daadwerkelijk een spektakel op zal leveren?
Resistance is futile.
Mijn telescoop is binnengekomen, van het weekeinde in elkaar zetten.
In Baden-Badener Badeseen kann man Baden-Badener baden sehen.
Zou zo'n komeet ook te volgen zijn met mijn goedkope telescoop waarbij ik al moeite heb om Jupiter bij te houden op de grootste vergroting? 
100.000 katjes
Fuck the EBU!
Fuck the EBU!
Hopelijk heb je hem niet nodig!quote:
Zou zo'n komeet ook te volgen zijn met mijn goedkope telescoop waarbij ik al moeite heb om Jupiter bij te houden op de grootste vergroting?
In Baden-Badener Badeseen kann man Baden-Badener baden sehen.
Voor de maan heb je ook geen telescoop nodig, maar toch zie je met veel meerquote:
[..]
Hopelijk heb je hem niet nodig!
100.000 katjes
Fuck the EBU!
Fuck the EBU!
Kloptquote:
[..]
Voor de maan heb je ook geen telescoop nodig, maar toch zie je met veel meer
In Baden-Badener Badeseen kann man Baden-Badener baden sehen.
Je ziet idd meer details....quote:
[..]
Voor de maan heb je ook geen telescoop nodig, maar toch zie je met veel meer
Maar bij Ison zul je geen telescoop nodig hebben voor de details.
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A Timeline Of Comet ISON's Dangerous Journey
by Karen C. Fox for Goddard Space Flight Center
Greenbelt MD (SPX) Jul 18, 2013
A comet's journey through the solar system is perilous and violent. A giant ejection of solar material from the sun could rip its tail off. Before it reaches Mars - at some 230 million miles away from the sun - the radiation of the sun begins to boil its water, the first step toward breaking apart.
And, if it survives all this, the intense radiation and pressure as it flies near the surface of the sun could destroy it altogether.
Right now, Comet ISON is making that journey. It began its trip from the Oort cloud region of our solar system and is now travelling toward the sun.
The comet will reach its closest approach to the sun on Thanksgiving Day - 28 Nov 2013.
skimming just 730,000 miles above the sun's surface.
If it comes around the sun without breaking up, the comet will be visible in the Northern Hemisphere with the naked eye, and from what we see now, ISON is predicted to be a particularly bright and beautiful comet.
Cataloged as C/2012 S1, Comet ISON was first spotted 585 million miles away in September 2012. This is its very first trip around the sun, which means it is still made of pristine matter from the earliest days of the solar system's formation, its top layers never having been lost by a trip near the sun.
Scientists will point as many ground-based observatories as they can and at least 15 space-based assets towards the comet along the way, in order to learn more about this time capsule from when the solar system first formed.
Even if the comet does not survive, tracking its journey will help scientists understand what the comet is made of, how it reacts to its environment, and what this explains about the origins of the solar system.
Closer to the sun, watching how the comet and its tail interact with the vast solar atmosphere can teach scientists more about the sun itself.
NASA has initiated a Comet ISON Observing Campaign to facilitate a massive global observation campaign incorporating both space-based and ground-based telescopes and encouraging citizen scientists and both professional and amateur astronomers to participate
by Karen C. Fox for Goddard Space Flight Center
Greenbelt MD (SPX) Jul 18, 2013
A comet's journey through the solar system is perilous and violent. A giant ejection of solar material from the sun could rip its tail off. Before it reaches Mars - at some 230 million miles away from the sun - the radiation of the sun begins to boil its water, the first step toward breaking apart.
And, if it survives all this, the intense radiation and pressure as it flies near the surface of the sun could destroy it altogether.
Right now, Comet ISON is making that journey. It began its trip from the Oort cloud region of our solar system and is now travelling toward the sun.
The comet will reach its closest approach to the sun on Thanksgiving Day - 28 Nov 2013.
skimming just 730,000 miles above the sun's surface.
If it comes around the sun without breaking up, the comet will be visible in the Northern Hemisphere with the naked eye, and from what we see now, ISON is predicted to be a particularly bright and beautiful comet.
Cataloged as C/2012 S1, Comet ISON was first spotted 585 million miles away in September 2012. This is its very first trip around the sun, which means it is still made of pristine matter from the earliest days of the solar system's formation, its top layers never having been lost by a trip near the sun.
Scientists will point as many ground-based observatories as they can and at least 15 space-based assets towards the comet along the way, in order to learn more about this time capsule from when the solar system first formed.
Even if the comet does not survive, tracking its journey will help scientists understand what the comet is made of, how it reacts to its environment, and what this explains about the origins of the solar system.
Closer to the sun, watching how the comet and its tail interact with the vast solar atmosphere can teach scientists more about the sun itself.
NASA has initiated a Comet ISON Observing Campaign to facilitate a massive global observation campaign incorporating both space-based and ground-based telescopes and encouraging citizen scientists and both professional and amateur astronomers to participate
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'Comet of the Century' Already May Have Fizzled Out'
CAPE CANAVERAL, FLORIDA —
Astronomers slated to meet this week to discuss observing plans for Comet ISON may not have much to talk about. The so-called “Comet of the Century” may already have fizzled out.
“The future of comet ISON does not look bright,” astronomer Ignacio Ferrin, with the University of Antioquia in Colombia, said in a statement on Monday.
Ferrin's calculations show the comet, which is currently moving toward the sun at 16 miles (26 km) per second, has not brightened since mid-January. That may be because the comet is already out of ice particles in its body, which melt as the comet moves closer to the sun, creating a long, bright tail.
Another theory is that the comet is covered in a layer of silicate dust that snuffs out water vapor and other gasses that brighten the comet.
“Comet ISON has been on a standstill for more than 132 days ... a rather puzzling feat,” Ferrin wrote in a paper submitted to the Monthly Notices of the Royal Astronomical Society and posted online at the archival site arXiv.org.
The comet, named ISON for the International Scientific Optical Network that made its discovery, was found in September 2012 by two amateur Russian astronomers.
It is due to pass about 724,000 miles (1.2 million km) from the sun on Nov. 28. The relatively close pass was expected to create a massive tail that some scientists predict will be visible even in daylight.
If it survives, that is. At that distance, the comet would reach temperatures of about 4,900 degrees Fahrenheit (2,700 degrees Celsius) - hot enough to melt lead. It may also be pulled apart by the sun's gravity.
Scientists believe the comet hails from the Oort Cloud, a cluster of icy rocks that circle the sun about 50,000 times farther away than Earth's orbit. Calculations show Comet ISON is making its first - and possibly last - voyage into the inner solar system.
CAPE CANAVERAL, FLORIDA —
Astronomers slated to meet this week to discuss observing plans for Comet ISON may not have much to talk about. The so-called “Comet of the Century” may already have fizzled out.
“The future of comet ISON does not look bright,” astronomer Ignacio Ferrin, with the University of Antioquia in Colombia, said in a statement on Monday.
Ferrin's calculations show the comet, which is currently moving toward the sun at 16 miles (26 km) per second, has not brightened since mid-January. That may be because the comet is already out of ice particles in its body, which melt as the comet moves closer to the sun, creating a long, bright tail.
Another theory is that the comet is covered in a layer of silicate dust that snuffs out water vapor and other gasses that brighten the comet.
“Comet ISON has been on a standstill for more than 132 days ... a rather puzzling feat,” Ferrin wrote in a paper submitted to the Monthly Notices of the Royal Astronomical Society and posted online at the archival site arXiv.org.
The comet, named ISON for the International Scientific Optical Network that made its discovery, was found in September 2012 by two amateur Russian astronomers.
It is due to pass about 724,000 miles (1.2 million km) from the sun on Nov. 28. The relatively close pass was expected to create a massive tail that some scientists predict will be visible even in daylight.
If it survives, that is. At that distance, the comet would reach temperatures of about 4,900 degrees Fahrenheit (2,700 degrees Celsius) - hot enough to melt lead. It may also be pulled apart by the sun's gravity.
Scientists believe the comet hails from the Oort Cloud, a cluster of icy rocks that circle the sun about 50,000 times farther away than Earth's orbit. Calculations show Comet ISON is making its first - and possibly last - voyage into the inner solar system.
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2700 graden celsius, heet genoeg om lood te smelten?
Jeez, 2700 o C is heet genoeg om de meeste zaken te doen smelten, ja zelfs te doen koken
Jeez, 2700 o C is heet genoeg om de meeste zaken te doen smelten, ja zelfs te doen koken
In Baden-Badener Badeseen kann man Baden-Badener baden sehen.
Die hypes ook altijd.
Helderste komeet...
Koudste zomer...
Vrede nabij tussen Israel en Palestina...
Jaaaajaaa
Helderste komeet...
Koudste zomer...
Vrede nabij tussen Israel en Palestina...
Jaaaajaaa
I feel kinda Locrian today
Jij definieert jouw succes aan de hand van het feit dat je gaat trouwen en een kind krijgt, dus jouw mening telt niet.quote:
Die hypes ook altijd.
Helderste komeet...
Koudste zomer...
Vrede nabij tussen Israel en Palestina...
Jaaaajaaa
Vrouwen
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