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This Concept Map, created with IHMC CmapTools, has information related to: Universe, Universe is made up of the moon, over time by chemical reactions, Universe changes over time, Universe changes slow, Universe is made up of comets, astronomers use telescopes, astronomers use microscopes, Universe is made up of planets, Universe is studied by astronomers, over time by forming new substances, over time by decomposing, Universe is made up of galaxies, astronomers use observation, Universe changes constant, Universe is made up of stars, Universe changes fast, Universe is made up of meteroids