Originally Nebular hypothesis theory was given by German philosopher Immanuel Kant. In 1776, mathematician Laplace revised this theory.
As per nebular hypothesis theory:
Sun was surrounded by a solar nebula comprised of mostly hydrogen and helium along with dust. Friction and collision of particles lead to the formation of a disk-shaped cloud. Through the process of accretion, planets were formed out of material associated with the youthful sun.
As per nebular hypothesis theory:
Sun was surrounded by a solar nebula comprised of mostly hydrogen and helium along with dust. Friction and collision of particles lead to the formation of a disk-shaped cloud. Through the process of accretion, planets were formed out of material associated with the youthful sun.
Criticism:
- Nebular hypothesis theory does not explain the sources of origin of the nebula.
- It was not able to explain the sources of heat and motion of the nebula.
- As per the nebula hypothesis, the nebula is the gaseous state so the planet should also be in gaseous form, but the same is not true planets are not in the gaseous state.
- The theory is not able to explain how gases nebula leads to the formation of solid planets.
- All the planets and satellites should rotate in the same direction as nebula rotate but the same is not true. As we know that all planets in our solar system rotate anti-clockwise except Venus and Uranus.
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