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Physics, 04.08.2019 10:30 kiki1718

Which of the following correctly describes the hierarchy that exists in the universe? a galaxy refers to all existing matter, energy, and space that is held together by gravity. a galaxy is a collection of planets, their moons, and other objects in orbit around a central star. a solar system refers to all existing matter, energy, and space that is held together by gravity. a solar system is a collection of planets, their moons, and other objects in orbit around a central star.

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