The spinning of the Earth on its axis
Rotate/Rotation
A natural satellite in space that revolves around a planet
Moon
Dark gray spots on the moon
Maria
Imaginary line about which an object rotates
Axis
Craters form when asteroids and comets collide with the surface
Crater
The air that surrounds the Earth; it is made of a mixture of gases
Atmosphere
The star that is at the center of our solar system
Sun
To move in an orbit or circle around something
Revolve/Revolving
The path an object takes as it moves around another object
Orbit
Naturally occurring object in space such as a star, planet, moon, or galaxy, or comet
Celestial body