How are Galaxies formed? Along with the Black Holes in the middle of them.?

Question

I don't recall the answer to this.

If there is a black hole in the middle of the galaxy how was it formed?

Answer 1

Watch "Universe" on the History Channel. It gives a great explanation. Briefly, under the big band theory, as matter was formed in large-enough "clumps", it attracted other matter. This led to the formation of stars, and due to non-homogeniety ("lumps"), galaxies.

The universe is old enough to have produced two generations of stars. In the first generation, very large stars became supernova when they "died", and the residual collapsed into a black hole. Black holes are also matter, and they tended to congregate in the center of the galaxy, and coalese into a maga-black hole, where is merrily chomps on stars.

Answer 2

Spiral galaxies form from the collapse of a protogalactic cloud. When the protogalactic cloud collapses, the stars in the bulge and halo form first. These stars have rather random orbits around the galactic center. The remainder of the cloud forms a disk due to the conservation of angular momentum. The stars in the disk form later and thus the disk population of stars are younger than those in the bulge and the halo. Further, the stars in the disk rotate around the center of the galaxy in a collective, well defined way.

Elliptical galaxies are thought to be formed as a result of a merger of two disk galaxies. When two spiral galaxies merge, then the orbits of all the stars are randomized. As a result, all the stars in an elliptical galaxy have random orbits and there is not much collective motion of stars.

Black holes are formed by the collapse of large stars typically 10x the mass of our Sun. Having more matter in the central bulge of the galaxy increases the odds of having stars accrue more mass there through collisions and absorption. The formation of a black hole would thus be likely in that area of the galaxy.

The cause of a black hole is not a mystery and certainly does not depend upon strings. It is simply a natural occurrence in the death of a massive star.

Answer 3

Once upon a time, 13 billions of years ago, there was nothing but super-hot energy in the universe.

As the universe expanded it cooled, allowing hydrogen and helium to form.

The universe wasn't smooth, there were lumps and bumps that eventually grew to create huge gas and dust clouds.

Gravity from the matter in the clouds caused them to collapse, forming a lot of stars near each other, and they became small galaxies.

Small galaxies moving through space can collide with other small galaxies, forming larger ones.

The motion of stars and gas and dust clouds in the centres of both small and large galaxies (where there is a lot more matter than in the outer edges) cause the stars that form in the centre to be large.

Large stars burn their fuel faster, eventually explode (the shock waves trigger even more stars to form) and/or collapse into black holes.

The black hole that forms continues to attract and absorb dust and stars from the area around it, making it bigger and bigger, eventually becoming a supermassive black hole.

Answer 4

Me thinks "somebody" is having a bit of fun here. Yes there are black holes in the centers of the galaxies.
However, if there is even ONE person in this community who has the time to explain the whys and hows, I would genuinely be amazed
I have some other stuff to do for the next month, but I can recommend "space.com" for your answers to the mysteries of the universe/s.
It may have all begun with some things called "strings".

Nad