nebular hypothesis

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nebular hypothesis

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

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

neb′ular hypoth′esis

the theory that the solar system evolved from a mass of nebular matter.

neb·u·lar hypothesis

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 ?
Previous studies have shown that metallicity plays a role in planet formation, but it's unclear how.
Through the plato space mission), Further constraining planet formation theories.
We have long suspected that these objects should exist, because during the process of planet formation a lot of material should be ejected from planetary systems.
Astronomers believe it was probably thrown out of another star system during a period of planet formation.
A Dialogue Concerning the Two Chief Models of Planet Formation
This is such a young star; we have a snapshot of a baby star that just formed its planetary system - a rare peek at the final stage of planet formation," Smadar Naoz, an assistant professor of physics and astronomy at University of California, Los Angeles, and a co-author of a recent research paper on the subject, said in (http://newsroom.
Planet formation is a complex and tumultuous process that remains shrouded in mystery.
You run the risk that you evaporate a disk even before planet formation starts happening," he says.
It is "the first young planet that probably looks like Jupiter did billions of years ago, making it currently our most important corner-piece of the planet formation jigsaw puzzle," said Travis Barman, an associate professor of planetary sciences at the University of Arizona.
The post Scientists in Larnaca explore planet formation appeared first on Cyprus Mail .
He further added that their results demonstrated that the necessary conditions exist to modify planetary orbits and that these conditions were present at the time of planet formation, apparently due to the binary formation process.
In fact, HD 106906 b is unlike anything in our own solar system and throws a wrench in planet formation theories.