NASA's Mars rock samples might contain space germs that could be brought back to Earth if astronauts are not careful enough. In this handout released by NASA, angular and smooth surface of rocks are ...
Space.com on MSN
How do asteroids spin in space? The answer could help us prevent a catastrophic Earth impact
"With these probability maps, we can push asteroids away while preventing them from returning on an impact trajectory, protecting the Earth in the long run." ...
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