More is unknown than is known — we know how much there is, and we know some of its properties; other than that, dark energy is a mystery — but an important one. Known as dark matter, this bizarre ingredient does not emit light or energy. Its presence is implied in a variety of astrophysical observations, including gravitational effects that cannot be explained by accepted theories of gravity unless more matter is present than can be seen.
Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total energy density or about × − kg per cubic meter. Roughly 80% of the mass of the universe is made up of material that scientists cannot directly observe. Without dark matter, the universe would be a very different place, according to current theories. Roughly 70% of the Universe is made of dark energy. Dark matter makes up about 25%. Its gravitational effects are necessary to explain the rotation of galaxies, the motions of … Dark matter is the most mysterious, non-interacting substance in the Universe. What is dark energy? Hubble mosaic of massive galaxy cluster MACS J0717.5+3745, thought to be connected by a filament of dark matter. OK I Will bounce off this thread by stating that dark matter has a colossal effect on the fate of the universe. The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent).
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