How can a black hole hold a galaxy together?

Answer 1

The center of the (Milky Way) galaxy is a black hole. Think about a heterogeneous mixture of materials of different densities placed under the influence of gravity. Heavier materials tends to stay inner. Expect the same here. The heavier black hole is ought to stay at the center of the galaxy. Answer Scientist think that its a super black hole (I forgot what its really called), think of it as a egg, the yolk is the center and the white is the actual galaxy part. If you didn't know, the Andromeda galaxy has two 'yolks': there appear to be two main concentrations of mass near the center; some astronomers think this may be a sign that the Andromeda galaxy is the result of the collision of two smaller galaxies. A massive black hole is believed to be in the center of the Milky Way, and is now believed to be at the center of most, if not all, galaxies.
Current cosmology holds that a supermassive black hole
typically resides at the center of a galaxy.

Answer 2

There's no reason to suspect that the sun contains a black hole. A couple of decades ago the idea that the sun contained one or more miniature black holes was proposed in order to explain a discrepancy between the observed and the expected neutrino flux. We now know why this happens: the electron neutrinos produced are transforming into other types of neutrinos between the time they're produced and the time they reach Earth; taking that into account, the number of neutrinos detected is exactly what it should be, so no black holes are needed to explain the observed neutrino flux.

Answer 3

No. Only the the most massive stars become black holes. The vast majority of stars, up to about 8 to 10 times the mass of the sun form a dense remnant called a white dwarf. Stars between 10 and 25 and perhaps up to 40 times the mass of the sun form a denser remnant called a neutron star. Only stars 25 times the mass of the sun or more can form black holes. In the range of 25 to 40 solar masses, whether or not a black hole forms depends on how much of the star is blown away in the supernova and how much falls back into the collapsed core.

Answer 4

No one knows the answer to that just yet. We have only just confirmed that a supermassive black hole actually exists in the centre of the Milky Way.

Supermassive black holes can vary between hundreds of thousands to billions of solar masses

Answer 5

not every star can turn into a black hole, because it has to meet a certain size to do so. our sun will not turn into a black hole, how ever, it will destroy our planets. many stars can turn into black holes, but only when it meets the end of its life which is when it stops burning gas.

stars have to be big big enough and have enough gas to explode, wich creates a supernova then a black hole. there are many black holes in the universe and scientists believe that there is one in the center of our galaxy, the milky way.

the sun will eventually destroy our planets... but not worry, the sun is still a young star and will die in billions of years.

the sun eventually will start to run out of gas to burn on and keep on expanding. the sun will get a red colour and reach extreme tempratures. the sun gets so big and swollen, that it will definately engulf Mercury and venus and could just miss earth, but we would be very lucky for that to happen. when the red giant(sun) has run out of gas it will then turn into a white dwarf star. then it will run out of gas and turn into rock.

Answer 6

Quite the opposite actually. Super Massive stars turn into black holes. When a star's mass becomes so big that it's gravitational pull of the star can stop light itself, the fastest KNOWN particle or energy (Due to the Heisenberg Uncertainty Principle we can never be sure.) The theory that tachyons exist is still believed to be Science Fiction, but it is a real idea. But the idea of faster than light travel punches general relativity in the face. If tachyons are proved existing are understanding of the universe would be much, much different.

Answer 7

The Galactic Center is called the rotational center of the Milky Way galaxy. It is located about 7.6 kiloparsecs (24,800 Light Year) away from the Earth, toward the constellation Sagittarius, where the Milky Way appears brightest. Scientists have hypothesized that a super massive black hole lies in the Galactic Center of the Milky Way, and most (if not all) other galaxies.

I think galactic center is a common term an can be extended to other galaxies also.....
the core

Answer 8

A black hole is a region of space from which nothing, including light can escape. It is caused by a huge and very compact mass which is the result of a star that has collapsed. It is called "black" because it absorbs all the light that comes towards it, reflecting nothing.

If there were a black hole in the centre of the Earth then all of the Earth would have been sucked into it due to it's gravitational pull along with probably all the other planets in the solar system.

Answer 9

VY Canis Majoris (VY CMa) is a red Hypergiant star located in the constellation Canis Major. With a size of 2600 solar radii, it is the largest known star and also one of the most luminous known. It is located about 1.5 kiloparsecs (4.6×1016 km) or about 4,900 light years away from Earth.

Answer 10

Not for a long time. Either the black hole would swallow up Earth in a very short time; or (perhaps) a miniature black hole would evaporate faster than it can suck up matter, in which case it will disappear soon.