gravity define and Satellite moon
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This force of gravity causes the Moon to change direction to make it orbit around the Earth. Gravity doesn't disappear just because you are above the atmosphere. ... A satellite with a mass of 1000 kg has a weight force of 9800 N at the Earth's surface!!!
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Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects.
A natural satellite, or moon, is, in the most common usage, an astronomical body that orbits a planet or minor planet. In the Solar System, there are six planetary satellite systems containing 205 known natural satellites.
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