WKN Weer, Klimaat en Natuurrampen
Lees alles over het onstuimige weer op onze planeet, volg orkanen en tornado's, zie hoe vulkanen uitbarsten en hoe Moeder Aarde beeft bij een aardbeving. Alles over de verwoestende kracht van onze planeet en tal van andere natuurverschijnselen.
quote:Asteroid to pass between Earth and moon in 17,500mph close encounter
The chunk of space rock measuring up to 300ft will buzz the planet at a distance of around 100,000 miles, giving astronomers the chance to study it in detail.
An asteroid big enough to wipe out a city will hurtle between Earth and the moon's orbit this weekend in a close encounter visible through binoculars and small telescopes.
The chunk of space rock measuring up to 300ft (90m), around the size of Westminster's Elizabeth Tower (316ft or 96m) which houses Big Ben, will fly by at about 17,500mph.
Passing at around 100,000 miles (168,000km) - less than half the distance between Earth and the moon - will give astronomers the chance to study the "city killer" asteroid at close quarters.
While such cosmic encounters are common, NASA said it's rare for one so large to come so close - about once a decade.
Discovered a month ago, the asteroid known as 2023 DZ2 will harmlessly buzz the planet on Saturday, before heading back off into the solar system.
European Space Agency's planetary defence chief Richard Moissl said: "There is no chance of this 'city killer' striking Earth, but its close approach offers a great opportunity for observations."
Scientists with the International Asteroid Warning Network view it as good practice for planetary defence if and when a dangerous asteroid does pose a threat, according to NASA.
quote:Grote asteroide scheert zaterdag vlak langs de aarde
Haal zaterdag je telescoop of verrekijker maar tevoorschijn, want aan de hemel is een opmerkelijk verschijnsel te zien. Een asterode die groot genoeg is om in n klap een stad uit te roeien, vliegt dan tussen de aarde en de maan door. Dat gebeurt gemiddeld maar een keer per tien jaar, zegt NASA.
Ontdek 'm nu
Vooropgesteld: geen zorgen. De asterode blijft op veilige afstand en zal de maan en de aarde niet raken, schrijft de Britse krant The Guardian. "Er is geen kans dat deze 'stadsmoordenaar' de aarde treft", zegt Richard Moissl, hoofd planetaire defensie van het Europees Ruimteagentschap.
Maar het is wl een mooie kans voor wetenschappers om de ruimterots van dichtbij te bestuderen. "De nabijheid ervan biedt een geweldige mogelijkheid voor observaties." Astronomen van het International Asteroid Warning Network zien de langsvliegende asterode als een goede oefening in het beschermen van de aarde, voor het geval er ooit een gevaarlijke asterode wordt ontdekt die de aarde wl zou kunnen raken, zegt de NASA.
Dat asteroden langs vliegen is niet zo opmerkelijk. Maar volgens NASA is het zeldzaam dat zo'n grote asterode - wetenschappers schatten dat de diameter tussen de 49 en 90 meter is - van zo dichtbij te zien is.
De ruimterots, genaamd 2023 DZ2, vliegt eerst langs de maan, om een paar uur later langs de aarde te komen met een snelheid van 28.000 kilometer per uur. De asterode vliegt dan op iets meer dan 68.000 kilometer afstand langs. De laatste keer dat de 2023 DZ2 de aarde passeerde was in 2004, volgens het Near-Earth Object Coordination Centre.
Toch n beetje spannend hoor ! Volgende keer komt ie langs in 2026quote:
"You can call me Susan if it makes you happy"
Wacht even, dus niet alleen is hij een paar dagen van tevoren pas opgemerkt (fijn idee 
), maar in 2004 is dit ding gewoon voorbij komen vliegen zonder dat iemand 'm gezien heeft? :|
), maar in 2004 is dit ding gewoon voorbij komen vliegen zonder dat iemand 'm gezien heeft? :|
Goed punt..ik zie in de Engelstalige media nergens 2004 terugkomen. Ik vraag me af of dit een vertaalfout is.quote:Op maandag 27 maart 2023 00:08 schreef Kriegel het volgende:
Wacht even, dus niet alleen is hij een paar dagen van tevoren pas opgemerkt (fijn idee
Zeker omdat ze het ding inderdaad pas in februari 2023 hebben ontdekt.
(van alle NEO's met 2023 in de naam zijn ze pas dit jaar ontdekt )
Schijnbaar was het wel een probleem geworden als de asterode 19 uur later langs was gekomen...
quote:Very bright fireball, sonic boom over Auckland, New Zealand
A bright fireball followed by a sonic boom was seen over North Island, New Zealand at 10:42 UTC (22:42 LT) on June 3, 2023.
The International Meteor Organization (IMO) received 19 reports from Auckland, Northland and Waikato, and 2 videos.
Professor James Scott from Otago University’s Department of Geology said he had received quite a few reports of meteor sightings.
“It was seen across the top of the North Island, and captured on a security camera and also one of the fireball cameras,” Scott told NZ Herald.
“There was also a sonic boom heard by several people. There will almost certainly be more security cameras that picked it up but that often takes a few days to show up.”
One of the witnesses described the event as a huge white ball flash heading north across the sky.
Others said it was a ‘massive meteorite’… a beautiful sighting that lasted 10 to 30 seconds, with very bright white light, brighter than the moon followed by a long yellow tail and a small explosion before disappearing.
Gisteravond in Sofia een flinke jongen zien vallen.
Dit is een duidelijker filmpje https://www.vbox7.com/play:b327688942
Dit is een duidelijker filmpje https://www.vbox7.com/play:b327688942
"For the man sound of body and serene of mind, there is no such thing as bad weather; Every day has its beauty. And storms which whip the blood, do make it pulse more vigorously."
quote:Extremely close approach of asteroid 2023 RS at just 0.03 LD – the 5th closest on record
A newly-discovered asteroid designated 2023 RS flew past our planet at an extremely close distance of just 0.027 LD or 0.00007 AU (~10 361 km / 6 438 miles) from the center of Earth at 14:26 UTC on September 7, 2023. This is the 53rd known asteroid to fly past Earth within 1 lunar distance since the start of the year and the first so far this month.
The asteroid’s nearest point was around 2 381 km (1 479 miles) from the surface, ranking 2023 RS as the fifth closest asteroid flyby ever recorded.
The year 2023 also witnessed the fourth closest encounter with asteroid 2023 BU at 0.00007 AU on January 27. The third closest was in 2021 with 2021 UA1 at 0.00007 AU, followed by the second closest in 2020 with 2020 QG at 0.00006 AU. The closest known flyby occurred at 17:21 UTC on November 13, 2020, with asteroid 2020 VT4 approaching within 0.00005 AU (0.018 LD/6 746 km/4 191 miles) of Earth’s center.
2023 RS (temporary ID C9FMVU2) was first observed at Mt. Lemmon Survey just a couple of hours before its close approach. The object belongs to the Apollo group of asteroids and has an estimated diameter between 0.93 and 2.1 m (3 – 6.9 feet). It flew past us at a speed of 13.6 km/s.
Its next close approach will take place on January 29, 2024, at a distance of about 0.45 AU.
f asteroids measuring 0.93 m (3 feet) and 2.1 m (6.9 feet) in width were to enter Earth’s atmosphere, they would largely burn up due to intense friction with the air, creating bright streaks in the sky. The 0.93-m asteroid, being smaller, would likely disintegrate entirely before reaching the Earth’s surface. The 2.1-m asteroid, while also small, might have fragments that survive the atmospheric burn-up and reach the surface as meteorites. However, the impact of such fragments would be localized and unlikely to cause significant damage or harm. The primary effects of these asteroids would be the spectacular visual displays they’d offer, particularly during nighttime entries.
quote:Very bright fireball over downtown Beijing, China
A very bright fireball was observed in the skies over downtown Beijing, China at 11:40 UTC (19:40 local time) on Monday, January 29, 2024, creating a spectacular sight for residents and visitors.
This astronomical phenomenon, characterized by a sudden and intense light, is commonly caused by a meteor entering the Earth’s atmosphere and burning up, resulting in a bright and fast-moving light across the sky.
Fireballs, especially ones as bright as the one witnessed in Beijing today, are a rare occurrence over populated areas and are often followed by sonic booms. Sonic booms occur when the meteor travels through the Earth’s atmosphere at a speed exceeding the speed of sound, creating a powerful shockwave. This can sometimes be heard on the ground as a loud, explosive noise, adding an auditory element to the visual spectacle of the firebal
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