planetesimal hypothesis

noun

Definition of planetesimal hypothesis

: a hypothesis in astronomy: the planets have evolved by aggregation from planetesimals

Examples of planetesimal hypothesis in a Sentence

Recent Examples on the Web

So far, the planetesimal hypothesis seems to be the only explanation that fits the spectra seen. John Wenz, Popular Mechanics, "Scientists Think They've Found a Dead Planetary Core Orbiting a Dead Star," 4 Apr. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'planetesimal hypothesis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of planetesimal hypothesis

1904, in the meaning defined above

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15 Apr 2019

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The first known use of planetesimal hypothesis was in 1904

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