Dark Matter Was Minor Ingredient Of Galaxies In Early Universe
Dark Matter Was Minor Ingredient Of Galaxies In Early Universe
16 March 2017, 3:00 am EDT By Allan Adamson Tech Times
Dark matter is known to dominate galaxies today, but findings of a new study have suggested that it only played a minor role in galaxies of the early universe.
Dark Matter Today
Dark matter makes up about a quarter of the universe, which is far greater than ordinary matter that only makes up about 5 percent. The rest is composed of dark energy.
Although dark matter is invisible because it does not absorb, emit, or reflect light, it was discovered after scientists noticed that galaxies move as if they are influenced by gravity.
Dark matter interacts with normal matter through gravity. It is also responsible for the rotation speeds of spiral galaxies.Their presence can explain why outer parts of spiral galaxies rotate more quickly than would be expected if only the visible normal matter is present.
- See more at: http://www.techtimes.com/articles/201801/20170316/dark-matter-minor-ingredient-of-galaxies-in-early-universe.htm#sthash.jyTLHigJ.dpuf
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