sun - the star that keeps Earth warm, space - the empty area outside Earth's atmosphere, where the planets and the stars are:, astronaut - a person trained for travelling in space, solar system - the sun and the group of planets that move around it, meteor - a rock that produces bright light while travelling through the atmosphere, moon - the round object that moves in the sky around the earth and can be seen at night, orbit - the curved path through which objects in space move around a planet or star, scientist - an expert who studies in one of the sciences:, telescope - a cylinder-shaped device for making objects that are far away look closer and larger, gravity - the force that makes things fall to the ground,

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