universe39aph39s |
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navigate by keyword : physical cosmology astronomy dark energy unknown form affects universe largest scales observational evidence existence measurements supernovas expand constant rate universe39aph39s expansion accelerating abstract matter threads |
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In physical cosmology and astronomy, dark energy is an unknown form of energy that affects the universe on the largest scales. The first observational evidence for its existence came from measurements of supernovas, which showed that the universe does not expand at a constant rate rather, the universe's expansion is accelerating. |
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