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planetesimal hypothesis

Definition:

the theory that the solar system was formed by the gravitational accumulation of planetesimals

Class:

cognition noun (cognitive processes and contents)

Plural:

planetesimal hypotheses

Original source:

Princeton WordNet

Etymology:

planetesimal, from planet + infinitesimal
(Source: Collins Dictionary)  [more]

Definition references  (+images)

Collins Dictionary:

planetesimal hypothesis

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 ... (25 of 210 words, pronunciation)

www​.collinsdictionary​.com​/dictionary​/english​/planetesimal-hypothesis

Merriam-Webster:

planetesimal hypothesis

a hypothesis in astronomy: the planets have evolved by aggregation from planetesimals (12 of 26 words)

www​.merriam-webster​.com​/dictionary​/planetesimal hypothesis

American Heritage Dictionary:

planetesimal hypothesis

The hypothesis that the planets and satellites of the solar system were formed by gravitational aggregation of planetesimals. (18 of 21 words)

www​.yourdictionary​.com​/planetesimal-hypothesis

New World Dictionary:

planetesimal hypothesis

any of several theories postulating that the solar system originated with planetesimals (12 of 14 words)

www​.yourdictionary​.com​/planetesimal-hypothesis

Wikipedia:

Scientific theory

a well-substantiated explanation of some aspect of the natural world, based on a body of knowledge that has been repeatedly confirmed through observation and experiment. Scientists create scientific theories from hypotheses that have been corroborated ... (35 of 6526 words, 8 images)

en​.wikipedia​.org​/wiki​/Scientific theory

Britannica Encyclopedia:

scientific theory

systematic ideational structure of broad scope, conceived by the human imagination, that encompasses a family of empirical laws regarding regularities ... (20 of 357 words)

www​.britannica​.com​/E​Bchecked​/topic​/528971​/scientific-theory

Etymology reference

Collins Dictionary:

planetesimal hypothesis

First use: 20th century

Origin: planetesimal, from planet + infinitesimal

www​.collinsdictionary​.com​/dictionary​/english​/planetesimal-hypothesis

Audio references

Collins Dictionary:

planetesimal hypothesis

Audio: British English pronunciation of "planetesimal hypothesis"

www​.collinsdictionary​.com​/dictionary​/english​/planetesimal-hypothesis

YourDictionary Audio:

planetesimal hypothesis

Audio: North American English pronunciation of "planetesimal hypothesis" by speech synthesizer

www​.yourdictionary​.com​/planetesimal-hypothesis

Page last updated: 2013-06-26

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