The gravitational force between a mass and the Earth is the object's weight. Mass is considered a measure of an object's inertia, and its weight is the force exerted on the object in a gravitational field.

All eight of the planets in the solar system orbit around the Sun. Six of the planets rotate around their axis. The planets with retrograde rotation are Venus and Uranus. Every other planet rotates counter-clockwise.

Earth has 4 seasons, they are spring, summer, fall, and winter. The seasons are the result of the Earths tilt. Spring happens between March and May. Summer happens between June and August. Fall happens between September and November and Winter happens between December and February.

Earth has 4 main moon phases they are called new, 1st quarter, full, and last or 3rd quarter. Each moon phases lasts about 30 days. The moon phases have something to do with the positions of the sun.