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What is the universe? | Live Science

The universe is actually every thing, the sum of all existence. It consists of all matter, like stars and galaxies. The universe additionally consists of all radiation and all different types of vitality. No matter the place or whenever you exist, you’re part of the universe, as is every thing you expertise. There is nothing exterior the universe, as a result of something that exists is robotically included within the definition of the universe.

How previous is the universe, and is it increasing?

Our greatest understanding of the historical past of the universe comes from the Big Bang principle. Observations of distant galaxies reveal that each one galaxies are, on common, shifting away from each different galaxy. Astronomers interpret this movement to imply that the universe itself is increasing; on the very largest scales, the distances between galaxies develop with time. This means that previously, the universe was smaller, hotter and denser than it’s right now.

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