Why are all the planets different?
Think of the Solar System as a big family of planets. They started from the same cloud of dust, but they grew in different ways.
- Materials: Some planets are rocky (like Earth, Mercury, Venus, Mars). Others are big balls of gas (like Jupiter, Saturn, Uranus, Neptune).
- Size: Some planets are small, some are big.
- Distance from the Sun: Planets closer to the Sun stay warmer; far ones stay cooler. This makes them look and act differently.
- Days and years: Each planet spins at its own speed (days) and goes around the Sun in a different amount of time (years).
- Colors and looks: Surfaces and atmospheres give each planet its own color and look (Earth blue, Mars red, Jupiter stripes, etc.).
And all planets are round because gravity pulls matter into a ball.