#1
|
|||
|
|||
Black Holes
Will a black hole in a galaxy ever consume their entire galaxy. If so are there any known galaxies that are almost consumed by their black hole?
In a spiral galaxy is it the black hole that causes the spiraling, like water down a plug hole? Thank you |
#2
|
|||
|
|||
Black Holes
|
#3
|
|||
|
|||
Black Holes
In article ,
Martin Brown writes: No. [Black holes] will only consume any stars that happen to venture too close and find themselves in a tightly bound and ultimately decaying orbit. Also gas clouds if they are in tightly bound orbits. They are not the deranged cosmic vacuum cleaners of science fiction. Indeed! Eventually it will consume all the material available to it and become quiescent - visible only by the effect that it has on light passing by. Also by its gravitational effect on nearby stars and gas clouds. I suppose that's not strictly "visible" in the sense Martin meant, but have a look at https://www.youtube.com/watch?v=AZhUQl-wmq0 and read the caption. These stellar orbits are how the mass of the Galactic center black hole is known. Galaxy collisions can shake things up a lot - then when two massive black holes merge you get very spectacular fireworks and gravity waves that are detectable on Earth. "Gravitational waves." The term "gravity waves" means something else entirely. Hard to keep straight, though, if you don't often use these terms. -- Help keep our newsgroup healthy; please don't feed the trolls. Steve Willner Phone 617-495-7123 Cambridge, MA 02138 USA |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
worm holes next to black holes or in them? | Arc Michael | Misc | 1 | December 6th 17 09:21 AM |
Black holes not black after all (Forwarded) | Andrew Yee | Astronomy Misc | 1 | May 17th 08 06:31 AM |
Black holes: Saddam holes | [email protected] | Astronomy Misc | 7 | May 14th 06 05:10 AM |
Black Holes Aren't So Black (Forwarded) | Andrew Yee | Astronomy Misc | 2 | October 5th 05 10:57 PM |
Black Holes Aren't So Black (Forwarded) | Andrew Yee | News | 0 | October 3rd 05 03:49 PM |