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Old 02-16-2020, 05:55 AM
 
7 posts, read 1,571 times
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A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars.
Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or "stuff," in an object.
Another kind of black hole is called "stellar." Its mass can be up to 20 times more than the mass of the sun. There may be many, many stellar mass black holes in Earth's galaxy. Earth's galaxy is called the Milky Way.
Mod cut.

Last edited by PJSaturn; 03-06-2020 at 08:13 AM.. Reason: Spam.
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Old 02-16-2020, 12:23 PM
 
Location: Willamette Valley, Oregon
5,013 posts, read 1,508,605 times
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Here is a pretty good movie of a black hole disintegrating.



https://www.youtube.com/watch?v=ciWGrZMkXVM
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Old 02-18-2020, 09:14 PM
 
Location: Boston
4,063 posts, read 1,673,483 times
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[quote=sam5971;57348228]A black hole is a place in space where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Because no light can get out, people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars.
Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or "stuff," in an object.
Another kind of black hole is called "stellar." Its mass can be up to 20 times more than the mass of the sun. There may be many, many stellar mass black holes in Earth's galaxy. Earth's galaxy is called the Milky Way.
[Snip.]

Wouldn't a quantum black hole evaporate almost instantly?
I think so.

If the singularity in a hole is infinitely small then it has no size, there is no there...there.
But clearly something is there, so maybe its just energy that was formerly matter, it retains its gravity.

Last edited by PJSaturn; 03-06-2020 at 08:14 AM..
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