... Young also emphasized the Moon's potential role in global change detection, astronomy, and planetary defense, i.e., keeping a watchful eye on asteroids and comets that are potentially dangerous to the Earth. ...
... Young also emphasized the Moon's potential role in global change detection, astronomy, and planetary defense, i.e., keeping a watchful eye on asteroids and comets that are potentially dangerous to the Earth. ...
... For example, dust grains with a size of about 10-7 m were effectively produced for about 10-3 s in the fireballs formed after the Comet ShoemakerLevy 9Jupiter collision (Friedson, 1998). ...
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