nebular hypothesis


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Words related to nebular hypothesis

(cosmology) the theory that the solar system evolved from a hot gaseous nebula

References in periodicals archive ?
Current thinking has seesawed back to a refined version of the nebular hypothesis.
At present, the Solar Nebular Disk Model (SNDM) [41] has largely replaced the nebular hypothesis, although it maintains, in part, its relationship with the original ideas of Laplace.
In Memoriam's astronomical references focus on several contemporary topics: the vast scale of stellar astronomy, astronomical refraction, the nebular hypothesis of the origin of the universe, and the hypothesis' darkest implication: solar and stellar decay.
His suggestion was therefore called the nebular hypothesis. It proved very popular with astronomers for a time.
It is also reputed that Laplace, the famous French mathematician and astronomer, and a favorite of Napoleon, had been asked by the latter to explain his theory of the nebular hypothesis. When he had finished, the Emperor was supposed to have said, "But you have not mentioned God once in all this." To which Laplace replied, "I had no need of him, sire."
You've hit on a problem that flummoxed theorists for centuries, after Immanuel Kant proposed his (correct) "nebular hypothesis" of solar-system formation in 1755.
Laplace's nebular hypothesis (see 1796) had broken down over the fact that 98 percent of the angular momentum of the Solar System was concentrated in the planets, which made up only 0.1 percent of the total mass of the system.
Ideas like Laplace's nebular hypothesis, put forth in his Exposition du systeme du monde -- an attempt to understand how the Earth and its neighboring planets were formed -- were prevalent at the time.
Laplace's nebular hypothesis of the origin of the Solar System (see 1796) had held sway for a century, even though astronomers had grown steadily more dubious about it.