Ad
related to: nebular theory
Search results
Results From The WOW.Com Content Network
The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System (as well as other planetary systems). It suggests the Solar System is formed from gas and dust orbiting the Sun which clumped up together to form the planets.
The nebular hypothesis says that the Solar System formed from the gravitational collapse of a fragment of a giant molecular cloud, [9] most likely at the edge of a Wolf-Rayet bubble. [10] The cloud was about 20 parsecs (65 light years) across, [9] while the fragments were roughly 1 parsec (three and a quarter light-years) across. [11]
While the broad picture of the nebular hypothesis is widely accepted, [33] many of the details are not well understood and continue to be refined. The refined nebular model was developed entirely on observations of the Solar System because it was the only one known until the mid-1990s.
In 1905, Chamberlin and Forest Ray Moulton developed a theory of the formation of the Solar System that challenged the Laplacian nebular hypothesis. Their theory, the Chamberlin-Moulton planetesimal hypothesis , received favorable support for almost a third of a century, but passed out of favor by the late 1930s.
Kant proposes the nebular hypothesis, in which solar systems are the result of nebulae (interstellar clouds of dust) coalescing into accretion disks and then forming suns and their planets. [4] He also discusses comets, and postulates that the Milky Way is only one of many galaxies.
The nebular hypothesis of solar system formation describes how protoplanetary disks are thought to evolve into planetary systems. Electrostatic and gravitational interactions may cause the dust and ice grains in the disk to accrete into planetesimals .
In the grand tack hypothesis the migration of Jupiter is halted and reversed when it captured Saturn in an outer resonance. [36] The halting of Jupiter's and Saturn's migration and the capture of Uranus and Neptune in further resonances may have prevented the formation of a compact system of super-earths similar to many of those found by Kepler ...
The Solar System is believed to have formed according to the nebular hypothesis, first proposed in 1755 by Immanuel Kant and independently formulated by Pierre-Simon Laplace. [2] This theory holds that 4.6 billion years ago the Solar System formed from the gravitational collapse of a giant molecular cloud. This initial cloud was likely several ...