How can a black hole hold a galaxy together?

Answer 1

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 2

Black holes do not hold galaxies together. Instead, the combined gravitational pull of all the stars, gas, and dark matter within a galaxy is what keeps it together. Black holes at the center of galaxies play a role in shaping their structure and evolution, but they are not the primary force holding galaxies together.

Answer 3

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 4

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 5

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 6

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 7

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 8

Sometimes, In order to become a black hole the star must be at least eight times the size of our sun! Imagine the sun, one million earths can fit into it. Now imagine a star eight times in it; That's eight million earths! now think of how dense it would be if that huge star was packed to the size of an atom. Not even light can escape it's gravitational pull!

Answer 9

I don't think there is a special name for such a galaxy. If the galaxy radiates lots of energy, caused by such a black hole, it is called an "active" galaxy, or an active galactic nucleus. But that may vary with time. Note that most galaxies are believed to have supermassive black holes at their center.

Answer 10

'Do all' you mean. And it isn't necessary for all galaxies to have black holes at their centre, but it is extremely likely for there to be black holes in all galaxies due to the life cycle of stars.