Earth

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A solar system is made up of a star and all the bodies that orbit it. Our solar system consists of the Sun and all the planets, moons, and other bodies that orbit it. It is important for your children to understand that the Sun is our closest star but that there are other stars and planetary systems in the universe. Earth is the third planet from the Sun and, thus far, it is the only planet that scientists know can sustain life as we know it.