cosmogony: Related Content
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Topics
string theoryplanetesimalsolar nebulacollision theorygiant-impact hypothesisfission hypothesiscoaccretion hypothesisproto-Moonproto-Earthaccretioncosmologycelestial mechanicsradio and radar astronomyinfrared astronomyastrobiologymeteoriticsultraviolet astronomyastrophysicsspace explorationsolar system
Key People

Harold C. Urey
American chemist

Pherecydes of Syros
Greek writer

William Herschel
British-German astronomer

Gerard Peter Kuiper
American astronomer

Sir Harold Jeffreys
British astronomer and geophysicist

Ernst Öpik
Estonian astronomer

Sir George Darwin
British astronomer

Immanuel Velikovsky
American writer