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Twenty years of planetary defense

On March 11, 1998, asteroid astronomers around the world received an ominous message: new observational data on the recently discovered asteroid 1997 XF11 suggested there was a chance that the half-mile-wide (nearly one kilometer) ...

dateJul 24, 2018 in Space Exploration
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Image: Moon, Mars, station

This image was taken by ESA astronaut Alexander Gerst from the International Space Station on 30 June 2018 when the Moon and Mars were at its closest so far during his six-month Horizons mission.

dateJul 19, 2018 in Space Exploration
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