nebular hypothesis

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Related to Presolar nebula: Nebular theory

nebular hypothesis

n.
A hypothesis concerning the formation of stars and planets, and therefore the origin of the solar system, according to which a rotating nebula underwent gravitational collapse into a star with an accretion disk, from which planets condensed or formed by coagulation of dust particles into increasingly larger bodies.

nebular hypothesis

n
(Astronomy) the theory that the solar system evolved from the gravitational collapse of nebular matter

neb′ular hypoth′esis


n.
the theory that the solar system evolved from a mass of nebular matter.
[1830–40]

neb·u·lar hypothesis

(nĕb′yə-lər)
An explanation of the origin of the solar system according to which a rotating nebula cooled and contracted, flattening into a disk shape with a central bulge. The matter in the disk condensed into the planets, their moons, asteroids, and comets, while the great mass at the center became the sun.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nebular hypothesis - (cosmology) the theory that the solar system evolved from a hot gaseous nebulanebular hypothesis - (cosmology) the theory that the solar system evolved from a hot gaseous nebula
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
References in periodicals archive ?
The POM must have been created in interstellar space, the presolar nebula or the solar nebula and was then incorporated into the cometesimals [particles from which the comet formed] at the time of their formation.