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The name of Earth's natural satellite is the moon. In terms of size, the moon is not the biggest natural satellite in the solar system, but it is large and ranks fifth among the other moons. In fact, the moon is one of t... More »

Mars has two natural satellites, which are its two moons named Phobos and Deimos. The two moons of Mars orbit its atmosphere, just as Earth's moon orbits this planet. The discovery of the two Mars satellites dates back t... More »

Earth has many satellites orbiting it, but the only significant natural satellite that orbits the Earth is the moon. The Union of Concerned Scientists (UCS) maintains a listing of all man-made satellites orbiting the Ear... More »

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The Greek mathematician Pythagoras was the first to propose the idea of a round Earth, primarily based on the behavior of the Earth's shadow on the moon. Aristotle made several arguments for a spherical Earth based on ph... More »

The sun is bigger than both the moon and the Earth. The Earth is approximately 7,926 miles in diameter, while the sun is roughly 900,000 miles in diameter. The moon is smaller than both the sun and the Earth, with a diam... More »

The average distance from the Earth to the moon, 238,855 miles, is over 110 times greater than the moon's diameter of 2,159.2 miles. The moon completes its orbit around the Earth in 27 Earth days. More »

Earth has many satellites orbiting it, but the only significant natural satellite that orbits the Earth is the moon. The Union of Concerned Scientists (UCS) maintains a listing of all man-made satellites orbiting the Ear... More »