WITHIN THE DEBRIS DISK thrown up by a
giant impact, the moon began to coalesce after a few days.
Image: EIICHIRO KOKUBO National Astronomical Observatory Of Japan
If you ever find yourself at a cocktail party of astrophysicists and don't know what to say, try this: "But what about the angular momentum?" No matter
what the topic of conversation, you'll be guaranteed to sound erudite. Nearly every field of astronomy, from galaxy formation to star formation, has an
This article was originally published with the title Earth-Shattering Theory.
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