Quote Originally Posted by dragoon View Post

So your saying that technically we are one big accretion disk if all galaxies are powered by black holes. Therefore it is visible is it not.
What about a Quasar. Doesn't a Quasar give off extreme light and are also believed to be powered by black holes.

Lol we seem to have gone off track. So we are talking theoretically so therefore if all this is theoretical than could it also be theoretical that there is other life out there.
Kind of. When tracking accretion discs, it's easy to track their acceleration. It's not so much for galaxies. Accretion discs also radiate in infrared, which the rotation of galaxies doesn't do. Also, to say a quasar is powered by a black hole is redundant.