Jim
Justified & Ancient
- Joined
- Jan 19, 2016
- Messages
- 1,225
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- NYS, USA
All highly theoretical (not wrong, just not provably in an absolute scientific manner). No one knows for sure if dark matter holds galaxies, etc together and maintain the velocities (speed) needed for their present position in the universe.Galaxies need to have a certain amount of mass relative to the velocities of the stars in them otherwise they would fly apart, at any distance the deficit is deemed to be dark matter. Or something else we totally don't understand is going on.
So arouse the theory of dark matter. Which provides a convenient answer for this conundrum.
The following NASA article discusses dark matter and some uncertainty surrounding it.
https://science.nasa.gov/astrophysics/focus-areas/what-is-dark-energy
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