No - The volume of the Milky Way galaxy is larger than the volume of its host black hole.
The accumulated mass of the Milky Way galaxy is greater than the mass of its host black hole.
The density of the Milky Way galaxy is much smaller than the density of its host black hole.
Most identified black holes are much smaller than the Milky Way. If there was a black hole the mass of the Milky Way (which is probably 100,000 light years across) it would only be about 2/5ths of a single light year in width. Even the largest known black hole is much smaller than our galaxy.
It's theoretically possible for a black hole to be larger than the Milky Way, but as far as we know, most are much, much smaller both in mass and extent.
There is no such thing as a black hole with the mass of a galaxy. At least, none that we know of, and not if you are thinking of a large galaxy like the Milky Way. The largest known black hole has about 20 billion solar masses - which is still much less than the mass of a typical galaxy. For example, our Milky Way is estimated to have a mass of about 700 billion solar masses. However, such as massive black hole does have a mass comparable to smaller galaxies, i.e., dwarf galaxies. In any case, such huge black holes are found in the center of large galaxies.
A giant supermassive black hole is just remains of a once great star, and it collapsed into on itself, pressurizing so much gravity that it makes a hole in time and space in this universe, sucking in anything, so basically it is just a hole of gravity.
No. At least, the black holes in existence so far are much smaller in size, and have much less mass, than a galaxy. However, note that the black hole in the center of the largest galaxies can have more mass (but not more diameter) than some dwarf galaxies.
Not much actually. Scientists are still looking into it. What they do know though is that it has eaten up everything around it. Because of that, the supermassive black hole exists in a pitch black, empty area in the center of the Milky Way.
If the Earth were inside a black hole, it would appear much smaller due to the extreme gravitational forces bending light.
It's not certain but one possibility is the super massive black hole at the centre of the Milky Way which is believed to contain as much mass as billions of Suns.
A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.
A black hole is a region in space where gravity is so strong that nothing, not even light, can escape from it. The size of a black hole is determined by its mass, with smaller black holes being about the size of a city and larger ones being millions of times bigger than our sun. Compared to other celestial objects in the universe, black holes can be much smaller or much larger, depending on their mass.
Yes. VY Canis Majoris is about 4 billion kilometers across. This is comparable to the diameter of the event horizon of a 1.3 billion solar mass black hole. Black holes much larger than this have been detected in the centers of distant galaxies.
This is a common cause of confusion. In a way, if no mass got lost in the creation of a black hole, then it will have exactly the same gravity than before. For example, if our Sun converted to a black hole (not that it is planning to do so...), our Earth would continue orbiting this black hole, in the same orbit as before. What makes a black hole different is that the mass is very concentrated; so, it is possible to get much closer to the black hole - and remember that gravity gets stronger at shorter distances.