The name of the idea that all bodies in the solar system formed from a dominantly hydrogen/helium cloud Nebular Hypothesis
The sun and its orbiting planets make up the solar system, in which everything is bound together with the force of gravitation. Each planet travels around the sun along an orbit unique to that planet.
The distance between the planets is used to categorize them. The two categories of planets of the solar system based on their distance from the sun are
- Inside planets which consist of Mercury, Venus, Earth, and Mars
- Outside planets which consist of Jupiter, Saturn, Uranus, Neptune
Refer to more about the solar system here
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