Question #7ae60
1 Answer
Nov 24, 2017
A postulated and possibly gravitationally observed amount of matter necessary to satisfy (or disrupt) some prevalent theories of the universe.
Explanation:
"Roughly 80 percent of the mass of the universe is made up of material that scientists cannot directly observe. Known as dark matter, this bizarre ingredient does not emit light or energy."
How we think we know about it, and what it means:
https://www.space.com/20930-dark-matter.html
