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Earth Space Vocabulary

AB
revolutionone full orbit around the sun
axisan imaginary line around which an object spins
solar flarean explosive eruption of waves and particles into space
rotationone whole spin of an object on its axis
orbitthe path an object takes as it revolves around a star, planet, or moon
constellationa group of stars that forms a pattern
cometa frozen mass of different types of ice and dust orbiting the sun
moona natural object that revolves around a planet
planeta large, round object that revoloves around a star and has cleared the region around its orbit
dwarf planeta large, round object that revolves around the sun but has not cleared the region around its orbit
outer planetany of the four planets in our solar system beyond Mars
inner Planetany of the four closest planets to the sun
asteroida rocky mass up to several hundred kilometers wide that revolves around the sun
space probea spacecraft that gathers data without a crew



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