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What does the solar nebular theory explain?
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.
What is the solar nebula theory for kids?
The process by which solar systems are created is called the nebular theory. The spin of the planets around the Sun, and each around its own axis, was first caused by the original gas cloud having different density in different places.
What does the solar nebula theory not explain?
Laplace theorized that the Sun originally had an extended hot atmosphere throughout the Solar System, and that this “protostar cloud” cooled and contracted. The main issue was angular momentum distribution between the Sun and planets, which the nebular model could not explain.
What are the weakness of nebula cloud theory?
Although the nebular theory is widely accepted, there are still problems with it that astronomers have not been able to resolve. For example, there is the problem of tilted axes. According to the nebular theory, all planets around a star should be tilted the same way relative to the ecliptic.
What kind of observation lends supporting evidence to the solar nebula theory?
Comets, asteroids, and meteorites recovered on Earth also provide a number of clues and evidence of Nebular-type development. And the motions of most solar system objects orbit and rotate in an organized fashion.
What is planetary collision theory?
formation of planets most astronomers preferred the so-called collision theory, in which the planets were considered to have been formed as a result of a close approach to the Sun by some other star.
Why does the solar nebula theory predict that planetary system are common?
Why does the solar nebula theory predict that planetary systems are common? The solar nebula theory predicts that planets form as a natural byproduct of star formation. As the cloud collapses to form a star, small planetesimals form. These small planetesimals accrete matter to form planets.
What supports the solar nebula theory?
The types of objects found within the solar system provide significant clues and evidence to support the Nebular Theory. Comets, asteroids, and meteorites recovered on Earth also provide a number of clues and evidence of Nebular-type development.
What material is used in the solar nebula?
This disc, called the solar nebula, was composed mainly of hydrogen and helium, but also had other elements in smaller proportions. The nebula had a certain amount of angular momentum orbiting the forming Sun. Particles in the spinning disc began to clump together as gravity attracted them to each other.
What are the important theories in origin of solar system?
The Modern Laplacian theory French astronomer and mathematician Pierre-Simon Laplace first suggested in 1796 that the Sun and the planets formed in a rotating nebula which cooled and collapsed. The theory argued that this nebula condensed into rings, which eventually formed the planets and a central mass – the Sun.
What are some flaws with the solar nebula theory?
The flaws of nebula theory begin with interpretation, as mainstream scientists believe that the solar system formed randomly very slowly and gradually over billions of years as rotating clouds of dust and gas condensed to form the solar system, the planets, and the planetary moons.
What are problems with the nebular theory?
One problem with the nebular hypothesis is that although a slowly rotating cloud of gas and dust might collapse under gravity, sooner or later, centrifugal forces will prevent further collapse . That’s because rotatory energy must dissipate if the cloud is to collapse further.
What does the solar nebula theory state?
The nebular theory states that the solar system began as a huge cloud of dust and gas called a nebula, which later condensed to form the sun and its nine planets. The nebular theory has been revised many times as new data have been gathered. And it will likely be revised many more times.
How do you explain the nebular theory?
Nebular Hypothesis Originally there was a large, hot, gaseous nebula which rotated along its axis. As the gas lost energy by radiation, it became cooler. The cooling and contraction of Nebula continued and ultimately a stage came when the centrifugal force became greater than the gravitational attraction acting inward.
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