See asteroid Dimorphous, pre- and post-impact, in this time-lapse of Hubble Space Telescope imagery. The space rock was impacted by NASA DART mission. Credit: SCIENCE: NASA, ESA, STScI, Jian-Yang Li ...
Asteroid 2024 YR4 will not hit Earth, but it has forced planetary defense experts to confront a different kind of worst case: a significant chance that a “city killer” rock could slam into the Moon ...
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