Just as the Moon orbits the Earth because of the pull of Earth's gravity, the Earth orbits the Sun because of the pull of the Sun's gravity. ... But the gravity of the Sun alters its course, causing it to travel around the Sun, in a shape very near to a circle.

Because the amount of gravity exerted by the sun is so much more than the Earth’s gravitational pull, the Earth is forced into an orbit around the sun. The sun’s gravity pulls the Earth toward it the same way it does to all the other planets in the solar system. It is similar to the way the Earth has captured the moon. Earth’s gravitational pull is far stronger than that of the moon, so the latter is forced into orbit around the former. But people know that gravity here on Earth causes objects to fall to the ground when dropped. They don’t orbit. Other forces are at work in space.

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For Earth to make one complete revolution around the Sun takes 365.24 days. ... The gravitational pull of the Sun keeps Earth and the other planets in orbit around the star. Like the other planets, Earth's orbital path is an ellipse so the planet is sometimes farther away from the Sun than at other times.

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