nebular hypothesis


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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 classic literature ?
It must be, if the nebular hypothesis has any truth, older than our world; and long before this earth ceased to be molten, life upon its surface must have begun its course.
I had about deduced from certain astronomic phenomena I have had under minute observation during the past several tropic nights an entirely new nebular hypothesis which will unquestionably startle the scientific world.
They were as follows: 1) Laplace's nebular hypothesis [22, 23], 2) Helmholtz' contraction theory [24, 25], 3) Cagniard de la Tour's discovery of critical phenomena [26, 27] and Andrew's elucidation of critical temperatures [28, 29], 4) Kirchhoff's formulation of his law of thermal emission [30-32], and 5) the discovery of pressure broadening in gases by Plucker, Hittorf, Wullner, Frankland, and Lockyer [33-37].
Copernicus gestures in an impatient, get-to-the-point manner) In my Exposition du systeme du monde, my nebular hypothesis is articulated.
In particular, the increasingly popular, but oft criticized, nebular hypothesis of creation suggested how the cooling of heated gas could form the stars and solar system apart from divine intervention.