News tagged with exosphere
Exosphere
The exosphere is the uppermost layer of Earth's atmosphere. In the exosphere, an upward travelling molecule moving fast enough to attain escape velocity can escape to space with a low chance of collisions; if it is moving below escape velocity it will be prevented from escaping from the celestial body by gravity. In either case, such a molecule is unlikely to collide with another molecule due to the exosphere's low density.
For more information about Exosphere, read the full article at
Wikipedia.
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Solar storms could 'sandblast' the moon
(PhysOrg.com) -- Solar storms and associated Coronal Mass Ejections (CMEs) can significantly erode the lunar surface according to a new set of computer simulations by NASA scientists. In addition to removing ...
Space & Earth / Space Exploration
Dec 06, 2011 |
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Space scientists ready for orbital insertion of Mercury spacecraft
NASA's MESSENGER mission, launched in 2004, is slated to slide into Mercury's orbit March 17 after a harrowing 4.7 billion mile journey that involved 15 loops around the sun and will bring relief and rene ...
Space & Earth / Space Exploration
Mar 15, 2011 |
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Extreme effects: Seven things you didn't know about Mercury
Pity poor Mercury. The tiny planet endures endless assaults by intense sunlight, powerful solar wind and high-speed miniature meteoroids called micrometeoroids. The planet's flimsy covering, the exosphere, ...
Space & Earth / Space Exploration
Sep 01, 2010 |
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Model Helps Search for Moon Dust Fountains
(PhysOrg.com) -- In exploration, sometimes you find more than what you're looking for, including things that shouldn’t be there. As the Apollo 17 astronauts orbited over the night side of the moon, with the ...
Space & Earth / Space Exploration
Jun 10, 2010 |
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LADEE Mission to Study the Moon's Fragile Atmosphere
Right now, the Moon is a ghost town. Nothing stirs. Here and there, an abandoned Apollo rover — or the dusty base of a lunar lander — linger as silent testimony to past human activity. But these days, only ...
Space & Earth / Space Exploration
Oct 26, 2009 |
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Magnesium detected in MESSENGER flyby of Mercury (w/Video)
NASA's MESSENGER spacecraft served up another curveball to a University of Colorado at Boulder team after a second flyby of the hot inner planet Oct. 6 detected magnesium -- an element created inside exploding ...
Space & Earth / Space Exploration
Apr 30, 2009 |
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