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quote:
Op woensdag 23 februari 2005 11:06 schreef Doffy het volgende:
Ongelofelijk! Nu is er zulk nieuws over Mars, en dan wordt dat in dit topic niet onmiddelijk gemeld!
Het gaat in dit topic hoofdzakelijk over de opnames en vondsten die de Marsrovers maken...

Je had het bericht ook hier Ruimtevaart, foto's en missies of De astronomische kalender kunnen plaatsen.

Maar omdat er weinig gebeurd op dit moment...

[ Bericht 4% gewijzigd door -CRASH- op 23-02-2005 14:42:16 ]
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TT aangepast.
  woensdag 23 februari 2005 @ 14:48:48 #28
27698 Doffy
Eigenlijk allang vertrokken
pi_25215060
quote:
Op woensdag 23 februari 2005 14:34 schreef -CRASH- het volgende:
Het gaat in dit topic hoofdzakelijk over de opnames en vondsten die de Marsrovers maken...
Ah, ok. Ik vond de TT algemeen genoeg -en de ontdekking belangrijk genoeg!- om het te posten. Hoop dat je het niet erg vindt!
'Nuff said
pi_25215189
quote:
Op woensdag 23 februari 2005 14:48 schreef Alicey het volgende:
TT aangepast.

En dat zonder eerst te vragen
quote:
Op woensdag 23 februari 2005 14:48 schreef Doffy het volgende:

[..]

Ah, ok. Ik vond de TT algemeen genoeg -en de ontdekking belangrijk genoeg!- om het te posten. Hoop dat je het niet erg vindt!
Tis nie erg.....
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pi_25297763
quote:


Op de eerste ‘Mars Express Science Conference’ die vorige week bij de ESTEC in Noordwijk werd gehouden, zijn vrijdag beelden vrijgegeven van de bevroren zee die onlangs op Mars werd ontdekt.

De indrukwekkende beelden zijn genaakt door de ‘High Resolution Stereo Camera’ (HRSC) aan boord van de Mars Express, de sonde van de ESA die sinds 25 december 2003 om de rode planeet cirkelt. De stereo camera maakt gedetailleerd opnames van het oppervlak van Mars in hoge resolutie, in kleur en in 3D. De beelden zijn in hoge resolutie te bekijken via de website van de ESA.
bron

Mooie foto. Heel mooi.
pi_25347525
quote:
Mars Rovers Break Driving Records, Examine Salty Soil
March 02, 2005



On three consecutive days, NASA's Mars Exploration Rover Opportunity accomplished unprecedented feats of martian motion, covering more total ground in that period than either Opportunity or its twin, Spirit, did in their first 70 days on Mars.

Spirit, meanwhile, has uncovered soil that is more than half salt, adding to the evidence for Mars' wet past. The golf-cart-size robots successfully completed their three-month primary missions in April 2004 and are continuing extended mission operations.

Opportunity set a one-day distance record for martian driving, 177.5 meters (582 feet), on Feb. 19. That was the first day of a three-day plan transmitted to the rover as a combined set of weekend instructions. During the preceding week, engineers at NASA's Jet Propulsion Laboratory had sent Opportunity and Spirit an upgrade of the rovers' software, onboard intelligence the rovers use for carrying out day-to-day commands.

The new record exceeded a two-week old former best by 13 percent. As on all previous long drives by either rover, the traverse began with "blind" driving, in which the rover followed a route determined in advance by rover planners at JPL using stereo images. That portion lasted an hour and covered most of the day's distance. Then Opportunity switched to "autonomous" driving for two and a half hours, pausing every 2 meters (6.6 feet) to look ahead for obstacles as it chose its own route ahead.

The next day, Opportunity used its new software to start another drive navigating for itself. "This is the first time either rover has picked up on a second day with continued autonomous driving," said Dr. Mark Maimone, rover mobility software engineer at JPL. "It's good to sit back and let the rover do the driving for us."

Not only did Opportunity avoid obstacles for four hours of driving, it covered more ground than a football field. Opportunity has a favorable power situation, due to relatively clean solar panels and increasing minutes of daylight each day as spring approaches in Mars' southern hemisphere. This allows several hours of operations daily.

On the third day of the three-day plan, the robotic geologist continued navigating itself and drove even farther, 109 meters (357 feet), pushing the three-day total to 390 meters (nearly a quarter mile). In one long weekend, Opportunity covered a distance equivalent to more than half of the 600 meters that had been part of each rover's original mission-success criteria during their first three months on Mars.

Opportunity has now driven 3,014 meters (1.87 miles) since landing; Spirit even farther, 4,157 meters (2.58 miles). Opportunity is heading south toward a rugged landscape called "etched terrain," where it might find exposures of deeper layers of bedrock than it has seen so far. Spirit is climbing "Husband Hill," with a pause on a ridge overlooking a valley north of the summit to see whether any potential targets below warrant a side trip.

As Spirit struggled up the slope approaching the ridgeline, the rover's wheels churned up soil that grabbed scientists' attention. "This was an absolutely serendipitous discovery," said Dr. Steve Squyres of Cornell University, Ithaca, N.Y., principal investigator for the rovers' science instruments. "We said, 'My gosh, that soil looks very bright. Before we go away, we should at least take a taste."

The bright patch of disturbed soil, dubbed "Paso Robles," has the highest salt concentration of any rock or soil ever examined on Mars. Combined information gained from inspecting it with Spirit's three spectrometers and panoramic camera suggests its main ingredient is an iron sulfate salt with water molecules bound into the mineral. The soil patch is also rich in phosphorus, but not otherwise like a high-phosphorus rock, called "Wishstone," that Spirit examined in December. "We're still trying to work out what this means, but clearly, with this much salt around, water had a hand here," Squyres said.

Meanwhile, scientists are re-calibrating data from both rovers' alpha particle X-ray spectrometers. These instruments are used to assess targets' elemental composition. The sensor heads for the two instruments were switched before launch. Therefore, data that Opportunity's spectrometer has collected have been analyzed using calibration files for Spirit's, and vice-versa. Fortunately, because the sensor heads are nearly identical, the effect on the elemental abundances determined by the instruments was very small. The scientists have taken this opportunity to go back and review the results for the mission so far and re-compute using correct calibration files. "The effect in all cases was less than the uncertainties in results, so none of our science conclusions are affected," Squyres said.

JPL, a division of the California Institute of Technology in Pasadena, has managed NASA's Mars Exploration Rover project since it began in 2000. Images and additional information about the rovers and their discoveries are available on the Internet at http://www.nasa.gov/vision/universe/solarsystem/mer_main.html and http://marsrovers.jpl.nasa.gov .


###
Guy Webster (818) 354-6278
Jet Propulsion Laboratory, Pasadena, California

Dolores Beasley (202) 358-1753
NASA Headquarters, Washington
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quote:
A. B.

Churned-Up Rocky Debris and Dust

NASA's Mars Exploration Rover Spirit has been analyzing sulfur-rich rocks and surface materials in the "Columbia Hills" in Gusev Crater on Mars. This image shows rocky debris and dust, which planetary scientists call "regolith" or "soil," that has been churned up by the rover wheels. This 40-centimeter-wide (16-inch-wide) patch of churned-up dirt, nicknamed "Paso Robles," contains brighter patches measured to be high in sulfur by Spirit's alpha particle X-ray Spectrometer. Spirit's panoramic camera took this (A) false-color (B) true-color image on martian day, or sol, 400 (Feb. 16, 2005), using filters at wavelengths of 750, 530, and 430 nanometers. Darker red hues in the image correspond to greater concentrations of oxidized soil and dust. Whiter and bluer hues correspond to sulfur-rich deposits that are not as heavily coated with soils or are not as highly oxidized.


A. B.

Sulfur-Rich Rocks and Dirt

NASA's Mars Exploration Rover Spirit has been analyzing sulfur-rich rocks and surface materials in the "Columbia Hills" in Gusev Crater on Mars. This image of a very soft, nodular, layered rock nicknamed "Peace" in honor of Martin Luther King Jr. shows a 4.5-centimeter-wide (1.8-inch-wide) hole Spirit ground into the surface with the rover's rock abrasion tool. The high sulfur content of the rock measured by Spirit's alpha particle X-ray spectrometer and its softness measured by the abrasion tool are probably evidence of past alteration by water. Spirit's panoramic camera took this (A) false-color (B) true-color image on martian day, or sol, 381 (Jan. 27, 2005), using Pancam filters at wavelengths of 750, 530, and 430 nanometers. Darker red hues in the image correspond to greater concentrations of oxidized soil and dust. Bluer hues correspond to sulfur-rich rock excavated or exposed by the abrasion tool and not as heavily coated with soils or not as highly oxidized.


[ Bericht 3% gewijzigd door -CRASH- op 08-03-2005 19:36:52 ]
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quote:
Mars rover gets new lease on life
Dust devil cleans Spirit's solar arrays


Klik foto


Mars scientists and engineers are elated about a dust-busting blast that has struck the Spirit rover at its Gusev crater exploration site.

Turns out that a martian whirlwind – dubbed a dust devil – likely zoomed over the robot high up in the Columbia Hills. That fleeting flyby effectively cleaned Spirit’s solar arrays, giving the robot a new lease on life.

Engineers report that the rover’s power reading quickly shot up to almost as high as when the rover landed on Mars over a year ago.

Gusev: Alive with dust devils

Rover scientists suspected something was up at the Gusev site when Spirit’s wheel tracks were disappearing. Onboard cameras could look down and see the tracks vanishing. Rover team members assumed that the site was experiencing a heavy dust loading in the atmosphere.

Indeed, the rover’s energy quickly dropped. Seeing the robot’s decreasing power level, controllers started to consider cutting back on rover Mars work.

"Gusev was alive with dust devils," explained one scientist familiar with rover operations.

But suddenly Spirit’s available energy rocketed to a high level. The plus-up in power, team members believe, was due to a whirlwind passing right over the robot, removing the dust that had collected on its solar cells.

Martian squeegee men

The impact of the devilish dust-off was significant.

"The noon solar output from the panels went from a 40 percent loss to just 7 percent," said rover science team member, Larry Crumpler, a research curator in volcanology and space sciences at the New Mexico Museum of Natural History and Science in Albuquerque.

Images of the panels taken later showed "beautiful dark panels," Crumpler explained. "And all the wires and edges on the [rover] deck have little dust tails. I think it might have been the Martian squeegee men. Either that or one heck of a buffeting by a dust devil," he said.


Spirit has been busy wrapping up a spectacular panorama from the vantage point of "Larry’s Lookout."

Miracle cleaning event

Earlier this month, lead investigator for the Mars Exploration Rover mission, Steve Squyres of Cornell University, noted that Spirit’s depleted power was reducing the number of hours per day available to snap photos.

Squyres couldn’t gauge the chance of what he called a "miracle cleaning event" – akin to what occurred months ago on Opportunity, its sister robot on the other side of Mars. "If it happens, I’ll take it!"

"We have to assume the worst…that the solar panels are going to stay dirty and just get dirtier," Squyres told SPACE.com at the time.

As to what caused Opportunity’s solar panels at Meridiani Planum to become cleaned is a puzzle, Squyres said. "Wind has to be involved at some level you figure. Frost might have helped. A frost build-up on arrays could coagulate the dust…but the fact is that we don’t understand it very well. But I’ll take it."


[ Bericht 4% gewijzigd door -CRASH- op 15-03-2005 23:01:08 ]
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Opportunity's View of 'Viking' Crater, Sol 421



On the 421st martian day, or sol, of its time on Mars (March 31,2005), NASA's Mars Exploration Rover Opportunity drove to within about 10 meters (33 feet) of a small crater called "Viking." After completing the day's 71-meter (233-foot) drive across flatland of the Meridiani Planum region, the rover used its navigation camera to take images combined into this view of its new surroundings, including the crater. That day was the last of Opportunity's second extended mission. On April 1, both Opportunity and its twin, Spirit, began third extensions approved by NASA for up to 18 more months of exploring Mars. This view is presented in a cylindrical projection with geometric seam correction.

Image credit: NASA/JPL
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  zaterdag 9 april 2005 @ 13:03:37 #35
52164 pfaf
pfief, pfaf, pfoef!
  zaterdag 9 april 2005 @ 20:48:29 #36
52513 whosvegas
The Trickster
pi_26106647
Cool dat in bovenstaandf lijstje van freeware Stars ook staat!
Ik denk dat ik morgen de nieuwe versie (1.3) ga uploaden.

Omdat ik de afgelopen tijd druk was met andere dingen, heb ik niet veel tijd gehad om er nieuwe dingen in te bouwen.
Are you nuts??
  zaterdag 9 april 2005 @ 20:53:58 #37
52513 whosvegas
The Trickster
pi_26106833
Ontopic
Ik vind het wel heel gaaf wat de rovers op Mars hebben laten zien. Met name dat er is aangetoond dat er vroeger vloeibaar water op het oppervlak van Mars heeft gestroomd. Het zou me niks verbazen als er nu nog (bacterieel) leven is op Mars. Als je kijkt op aarde in wat voor extreme omstandigeheden bacterien leven.
Are you nuts??
pi_26202324
Lijkt wel een kleine meteoriet inslag...
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pi_26444098
quote:
Next Stop: 'Methuselah'



NASA's Mars Exploration Rover Spirit is approaching an outcrop dubbed "Methuselah," which scientists intend for the rover to examine in detail for several days before resuming an uphill climb. This false-color view is assembled from frames taken by Spirit's panoramic camera on the rover's 454th martian day, or sol (April 13, 2005). It shows a region in the "Columbia Hills" slightly downhill from the rover. The view features two interesting outcrops in the middle distance and "Clark Hill" in the left background. The outcrop on the right, with rover tracks leading from it, is "Larry's Lookout." On the left is the Methuselah outcrop, with apparent layering. This view combines images taken through the camera's 750-nanometer, 530-nanometer and 430-nanometer filters.


Gusev Dust Devil Movie, Sol 456 (Plain and Isolated)



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pi_26460548
Die Dust Devil lijkt mij niet meer dan een doodgewone windhoos zoals wij die hier ook wel eens boven zandvlaktes hebben.
[ alle babes op 1 pagina via fok!wiki -bijgewerkt tot 20/10/2015 ]
Leve Kim , Leve Maduro , Leve Castro
#freeTarik #freeDemon_from_heaven
pi_26462701
quote:
Op zaterdag 23 april 2005 20:54 schreef BabeWatcher het volgende:
Die Dust Devil lijkt mij niet meer dan een doodgewone windhoos zoals wij die hier ook wel eens boven zandvlaktes hebben.
Het is ook gewoon een windhoos....
Maar op Mars kunnen ze extremer zijn dan hier op Aarde.
En de "zelzaamheid" ligt em in het voor de lens krijgen ( 2 zelfs)
en te kunnen filmen.
Het is het enige beweegende fenomeen wat er zich voor de lens afspeelt.
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pi_26585514
Oppotunity heeft het zwaar te voorduren...
Gaat door een aardige hoop zand heen.

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  vrijdag 29 april 2005 @ 02:03:38 #43
47122 ATuin-hek
theguyver's sidekick!
pi_26587579
tsja das het lastige van de afstand he. Alsie vast komt te zitten kan je niet ff met je schepje erheen

Hopelijk komtie niet vast te zitten...
Egregious professor of Cruel and Unusual Geography
Onikaan ni ov dovah
pi_26800780
quote:
Op woensdag 13 april 2005 19:18 schreef -CRASH- het volgende:
Lijkt wel een kleine meteoriet inslag...
quote:
Alweer een bevestiging.....

Opportunity Discovers Tiny Craters on Mars


27 April

On Earth, people tend to think of craters as giant holes in the ground like Meteor Crater in Arizona, ancient features too big to miss that mark the site of a catastrophic collision with an asteroid or comet.

But craters can also be small objects, like the two discovered recently by the Opportunity rover on the plains of Meridiani on Mars. Both are less than half an inch deep and clearly visible in images taken by the rover's navigation cameras.

"These are the smallest craters yet observed by either rover," said Matt Golombek, a veteran Mars researcher at NASA's Jet Propulsion Laboratory and principal scientist on the Mars Exploration Rover mission. "I think the smallest crater we saw in Gusev Crater (where Opportunity's twin, the Spirit rover, is exploring the other side of Mars) was 40 centimeters (15.7 inches) wide and that was in a hollow that had already been filled by sand and sediment."

The largest of the two craters discovered by Opportunity is only half as big, measuring 20 centimeters (7.9 inches) in diameter and 1 centimeter (0.4 inches) deep. The smallest of the two is 10 centimeters (3.9 inches) wide and less than 1 centimeter deep. Opportunity took pictures of the two tiny craters with its left and right navigation cameras, creating a stereo image that allowed scientists to measure their distance and size.

On Earth, small craters are not commonly recognized because they're quickly filled with dirt, pine needles, or other debris carried by water and wind. On Mars, craters are primarily filled by wind-blown sediment, though in the past they may also have been filled by lava, melting ice, or flowing water.

"Given that these two craters haven't been covered by sand even though they are surrounded by sand ripples on a flat plain lends support to the idea that they're fairly recent," said Golombek. "Of course, recent might mean any time from yesterday to 100 million years ago."

Both are impact craters formed either by an object from space that was large enough to make it through the martian atmosphere without burning up or by rock fragments ejected from a larger crater that formed when something crashed into the martian surface.

"Come to think of it," added Golombek, "there were also no small, fresh craters seen by the previous three martian landers, which include Pathfinder and the two Viking landers. These are the smallest craters yet seen on Mars." Golombek was project scientist for the Pathfinder mission.
Oppotunity zit vast.
Waarschijnlijk heeft de zand hem de genadeschot gegeven

Op SOL 446 trad Opportunity de zandbak binnen...


Wat later begon het rechter achterwiel (op de foto links)
al problemen te krijgen.


Weer wat later op SOL 446.... stilstand.


NU SOL 455......En daar staat ie dus nog steedts.



http://marsrovers.jpl.nas(...)unity/20050506a.html
http://marsrovers.jpl.nas(...)unity/20050506b.html

[ Bericht 0% gewijzigd door -CRASH- op 07-05-2005 14:30:19 ]
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pi_26815448
interessante stuff
pi_26822353
Die kan je wel afschrijven volgens mij. Wel een goede les voor de meisjes en jongens bij de NASA om voortaan ook aan vastzittende wielen te denken in het zand op mars......
pi_26873349
Reddingsplan voor de gestrande Opportunity
quote:
 
Great escape plan for Mars rover

The US space agency (Nasa) is to begin taking steps to spring its robotic rover Opportunity from the sand trap it is stranded in on Mars.



Engineers have tried simulating the conditions facing the rover on the Red Planet, to determine how best to extricate the robot from its jam.

Opportunity has been bogged down in a sand dune since a drive on 26 April.

After an external review, Nasa could begin developing the first commands to send to the rover on Monday.

Opportunity is positioned across the ridge of an elongated dune or ripple of soft sand that is about one-third of a metre (one foot) tall and 2.5m (8ft) wide.

Tall order

"We've climbed over dozens of ripples, but this one is different in that it seems to be a little taller and to have a steeper slope, about 15 degrees on part of its face," said rover engineer Mark Maimone.

The mission team has tried driving a test rover through manmade dunes at the Jet Propulsion Laboratory's testing facility in Pasadena, California.

The rover had no problem driving away, even when sunk belly-deep. But the test used the sand already available, which is thought to offer more traction than the finer, looser material at Opportunity's current position on Mars.

So researchers made up two tonnes of soil like that around Opportunity's wheels from play sand, diatomaceous Earth for swimming pool filters and mortar clay powder.

Experiments in this more powdery material suggest that Opportunity can drive out of the dune after some initial wheel-spinning.

Since landing more than 15 months ago, Opportunity has driven 5.4km (3.3 miles) across the surface of the Red Planet.
 
Het zit Opportunity niet mee. Vorige maand begaf net een van zijn wielen het.
quote:
 
Mars rover Opportunity has wheel trouble

The Mars rover Opportunity has lost the ability to steer one of its wheels. While the vehicle can still move, the failure may make it harder to study rocks up close.

The rover has six wheels aligned in two rows and each of the four corner wheels has its own steering mechanism. The problem is with the front right wheel, which can still roll but is now stuck at a 7° inward angle. NASA rover project manager Jim Erickson says it is like a car losing its power steering.

“At this point, with this one actuator failed, it’s an inconvenience, nothing more,” says rover chief scientist Steven Squyres. But he adds that the failure is a reminder that the rovers will not run forever and that “we should continue to get every bit of science out of these that we can”.
 
pi_27044724
Zal de reis nu eindelijk weer doorgaan
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  Moderator donderdag 19 mei 2005 @ 09:43:56 #49
8781 crew  Frutsel
pi_27141005
Cassini finds tiny moon tucked in Saturn's rings

LOS ANGELES, California (Reuters) -- The Cassini spacecraft has snapped pictures of a small moon it found tucked away in a gap in the outer ring of Saturn, scientists said last week.

Cassini, a joint project of NASA and the European and Italian space agencies, took a series of snapshots of the object on May 1, scientists at the Space Science Institute in Boulder, Colorado said in a statement.

A day later Cassini took an even closer picture of the moon that allowed scientists to estimate both its size and brightness.

The moon, identified for now as S/2005 S1, is about 7 kilometers (4 miles) across and reflects about half of the light that hits it as it orbits about 137,000 kilometers (85,000 miles) from the center of Saturn, scientists said.

The small moon is located about 250 kilometers (155 miles) inside the outer edge of Saturn's bright main rings in an area known as the Keeler gap.

Another Saturnian moon, Pan, also orbits the planet from within its rings and scientists believe there may be many others.



Carolyn Porco, imaging team leader at the Space Science Institute, said in a statement that further study of those embedded moons and how they interact with rings that surround them the could yield clues about how other planets in the solar system were formed.

Cassini, a $3 billion exploration project, was launched in 1997. In January, it released a probe that plunged to the surface of Saturn's largest moon, Titan and sent back the first images from its fog-shrouded surface
pi_27228793
quote:
Op donderdag 19 mei 2005 09:43 schreef Frutsel het volgende:
Cassini finds tiny moon tucked in Saturn's rings
-knip-
Verkeerd topic....
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