Solar System Two

The Sun is classified as a star, the Moon is classified as the satellite of our planet, and Earth is classified as a planet.

The planets order from the Sun; Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

The moon goes through phases every 28 days because that is how long it takes for it to orbit around Earth, meaning a Moon day is equivalent to 28 Earth days.

Gravity affects celestial bodies by keeping them in orbit and stopping them from straying away.