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This Concept Map, created with IHMC CmapTools, has information related to: Universe, 13 billion years old, we know this by measuring how long it takes light to travel to the Earth How do objects in the Universe form? By stars causing nuclear fusion or by the Big Bang Theory, By using telescopes, satelites, and charts to measure distances What objects make up the Universe? Atoms or matter and non-matter, Universe Properties How old is the Universe? 13 billion years old, we know this by measuring how long it takes light to travel to the Earth, As they become older they change in form and shape What causes these changes? Atoms being destroyed and created, By stars causing nuclear fusion or by the Big Bang Theory In what ways do the Univers and its objects change over time? As they become older they change in form and shape, Universe Properties How do astronomers study the Universe? By using telescopes, satelites, and charts to measure distances