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 Originally Posted by jackvance
Do galaxies form around black holes only?
All evidence currently suggests this is the case. Unfortunately, the evidence is pretty slim and slow to come in. It requires very sensitive instruments to observe our own galactic core, much less that of another galaxy.
The major issue is that in order to observe the center of a galaxy, you have to see past the rest of it. It's all the same stuff, so it's difficult to filter out the "noise".
Other effects, like gravitational lensing also show evidence for black holes.
A 6 1/2 minute video from 60 symbols that shows the evidence for the Milky Way's black hole(skip to 5:00 if that's all you're interested in).
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