Universe - Everything in existence (all of space), Galaxy - a group of many, many stars, planets, moons, comets, asteroids, gas, and dust held together by gravity, Milky Way Galaxy - galaxy that our Solar System is in, Asteroid - A rocky or metallic object that orbits the Sun and is much smaller than a planet, Asteroid belt - Space between Mars and Jupiter where most of the asteroids orbit (revolve) around the Sun, Comet - An object made of rock, ice, dust, and gas that revolves around the Sun, Gas/dust - part of matter that makes up a galaxy, Moon - A natural object that orbits a planet, Moon phases - daily changing pattern of light reflected from our moon during a month, Planet - a large body in space that orbits a star and does not produce its own light, Star - Balls of gas that give heat & light energy, Star patterns - groups of stars stay in same pattern but appear to move across the night sky because of Earth's revolution,

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