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A ball of hot, glowing gas


A large body of matter that moves around a star

Solar system

The sun, the planets, and their moons, and other objects that move around the sun


A large hole in the ground shaped like a bowl


An imaginary line through the center of the earth around which the earth rotates


To spin on an axis


The path an object follows as it moves around another object


Movement of an object in an orbit around another object


An object that revolves around another object


The shape of the lighted part of the moon


An instrument for making distant objects appear nearer and larger


A person who travels in space

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