planetesimal hypothesis

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The hypothesis that the planets and satellites of the solar system were formed by gravitational aggregation of planetesimals.

planetesimal hypothesis [ˌplænɪˈtɛsɪməl]

(Astronomy) the discredited theory that the close passage of a star to the sun caused many small bodies (planetesimals) to be drawn from the sun, eventually coalescing to form the planets

[planetesimal, from planet + infinitesimal]

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Noun

planetesimal hypothesis - (cosmology) the theory that the solar system was formed by the gravitational accumulation of planetesimals

scientific theory - a theory that explains scientific observations; "scientific theories must be falsifiable"

cosmogeny, cosmogony, cosmology - the branch of astrophysics that studies the origin and evolution and structure of the universe

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