nebular hypothesis(redirected from Pre-solar nebula)
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Related to Pre-solar nebula: Solar nebula theory
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.
(Astronomy) the theory that the solar system evolved from the gravitational collapse of nebular matter
the theory that the solar system evolved from a mass of nebular matter.
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.
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|Noun||1.||nebular 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"