and i heard theyr volume is billion times bigger thn the sun!is it true?
2006-07-31 11:20:24 · 16 answers · asked by last spiritual man 1 in Science & Mathematics ➔ Astronomy & Space
Many, but not all galaxies have central black holes. The Milky Way (our galaxy) and the Andromeda Spiral have such, but M33 does not (as I recall). Elliptical galaxies also have them. For example, M87 does. It seems likely that most galaxies with active nuclei have black holes in them. One problem is that central black holes, even of this size, only affect the dynamics of the galaxies close to the black hole. Farther away they are just like other big stars.
The masses of these black holes are usually in the range of 1-10 billion solar masses. This is mass, not diameter, by the way.
2006-07-31 12:14:44 · answer #1 · answered by mathematician 7 · 1⤊ 1⤋
The latest theory has black holes being at the center of every galaxy, pulling the matter around it into the center. The galaxies are comprised of many stars, planets, solar systems, and other matter. The more matter that is in proximity to the black hole, the stronger the force of the vacuum of the black hole. Since the black hole "feeds" on many millions of Suns, the volume of the black hole is much greater than an individual Sun.
2006-07-31 20:05:04 · answer #2 · answered by Todd W 1 · 0⤊ 0⤋
Most large elliptical and spiral galaxies, including the Milky Way, show evidence of a massive central black hole. In very large galaxies, the mass of the central black hole is equal to billions of Suns. The volume will not be billions of times the Sun's though, as black holes are incredibly dense.
2006-07-31 18:39:16 · answer #3 · answered by injanier 7 · 0⤊ 0⤋
No, not all...
I don't know that you could even say " most"..
It does seem that most spiral galaxies with a large central
"bulge" ( like our own Milky Way Galaxy ) do indeed have a black hole in the center...
I don't know that there are many black holes with the mass of
billions of suns but certainly millions is in the right range...
2006-07-31 18:44:15 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Maybe not all galaxies, but we suspect the bigger ones do. A black hole in the core of our own galaxy has been detected. Google Sagittarius* (pronounced "Sagittarius star"). Supermassive black holes can have billions of solar masses. Quasars are thought to contain supermassive black holes. But your term "volume" is not quite right -- the word you're looking for is "mass."
2006-08-01 00:05:33 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Black holes are dying stars stars became red giant thennova then supernova the white dwarf or a black hole. In the middle of galaxies there are quasars or black hole. Quasars are sometimes at middle of galaxies with high energy(electromagnetic). Black hole has high amount of gravity that even light cannot escape from it!
2006-07-31 22:04:44 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Black holes have actually been identified...not necessarily at the center. The increased mass of a black hole compresses mater exponentially...a quantity the size of a BB could weigh many many tons. The volume is actually smaller...but hey I and no one I know has actually measured them...so it is all scientific guessing.
2006-07-31 18:27:30 · answer #7 · answered by bluejets13 2 · 0⤊ 0⤋
Yes, but its not big enough to suck up the entire galaxy. Plus we are 3/4 the way out from it so even if it could get us it would take trillions of years, but it can't.
2006-07-31 18:25:09 · answer #8 · answered by broxolm 4 · 0⤊ 0⤋
Their MASS is bigger.
Hundreds of thousands to tens of billions times bigger.
Of course, huge volumes too.
http://en.wikipedia.org/wiki/Supermassive_black_hole.
That is all.
2006-07-31 18:57:19 · answer #9 · answered by shmux 6 · 0⤊ 0⤋
It is quite possible. It is generally believe that black holes are simply colapsed stars.
2006-07-31 18:24:08 · answer #10 · answered by Rance D 5 · 0⤊ 0⤋