giant impact theory

English

Alternative forms

  • giant-impact theory

Noun

giant impact theory

  1. The theory that the Moon was formed from the impact of the Earth with a hypothetical protoplanet some 4.5 billion years ago during the Hadean eon, first proposed by geologist Reginald Daly.

Synonyms

  • giant-impact hypothesis
  • Theia Impact

Hypernyms

Further reading

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