The correct option is The Earth and Planets.
Explanation
The Nebular Hypothesis is one of the earliest and most prominent theories regarding the origin of the Solar System. It was initially proposed by the German philosopher Immanuel Kant and later revised by the mathematician Pierre-Simon Laplace in 1796.
Detailed Analysis:
- The Hypothesis: It suggests that the planets were formed out of a cloud of material (nebula) associated with a youthful Sun, which was slowly rotating. As this cloud collapsed under its own gravity, it flattened into a spinning disk, leading to the formation of the Sun at the center and the planets from the surrounding material.
- Distinction from other theories:
- The origin of the Universe is primarily explained by the Big Bang Theory.
- The Nebular Hypothesis specifically addresses the formation of the Earth and Planets (the Solar System) rather than the universe or galaxies at large.
- The formation of the atmosphere is a subsequent process involving degassing and photosynthesis, occurring after the planetary formation.
Key Takeaway:
The Nebular Hypothesis explains the evolution of the Solar System from a rotating cloud of gas and dust, whereas the Big Bang Theory explains the origin of the Universe.