Quote:
Originally Posted by Lejina Bloodbath  Last I heard there's a black hole at the center of most galaxies. Essentially, the whole galaxie is rotating around it.
The brightness is due to the higher concentration of stars rotating around it the closer you get from it. |
Every galaxy discovered / studied has a black hole. The size of the black hole is directly proportional to the size of the galaxy. Currently there is a chicken and the egg theory. Do galaxies form because of the black holes or do the black holes form because of the galaxies.
The matter at the outer most edge of a galaxy does not rotate because of the black hole, but is in fact only effected by the gravity of surrounding matter.
The bright center is due to heat caused by the speed that the gas is moving as it gets closer and closer to the center of a black hole as well as star density. The gas is interacting / colliding with other material to produce the heat and thus is bright. But yes the density of galaxies is greater as you go toward the center.
Space is cool ... what I really love about is how much we dont know. All the answers are out there. We just have to put it together. And just when we think we are close and we got it...something gets in there that completely fucks with everything that we know causing us to scratch our heads.
What Eduardo is talking about is really gaining ground. There is evidence of both. Cool shit coming in the next century. The next telescope we put into space will make Hubble look like 5 dollar binoculars and the discoveries with it, will really change (again) how we view the universe.
