what is the universe
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- The physical Universe is defined as all of space and time (collectively referred to as spacetime) and their contents.
- Such contents comprise all of energy in its various forms, including electromagnetic radiation and matter, and therefore planets, moons, stars, galaxies, and the contents of intergalactic space.
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A universe is a natural made atmosphere which contains thousands of stars, planets and galaxies even our earth also lies in universe Galaxy ..
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