Keywords:- Dark energy: Process causing the Universe to speed up. (1)
- Dark mass: Some of the observations of the universe, such as the spinning rates of galaxies, cannot easily be explained using our current theories about gravity. Scientists have suggested that the matter we can see – stars, planets and galaxies – are only part of the mass of the universe. They have suggested that most of the mass is actually matter we cannot see, called dark matter. (1)
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