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Results tagged with black-hole
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user 1891
Questions regarding points of extremely high mass density, which creates an extremely strong gravitational field from which light cannot escape.
5
votes
Could Black holes forge heavier elements that have yet to be discovered?
The problem of the superheavy elements is not that we can't forge them. Their problem is that they decay very quickly. For example, Oganesson, the heaviest element synthetised until now, has a half li …
- 3,174
4
votes
I need to study space, planets and black holes, how do I study them on my own
I am sorry to say, but the best resources are still books. If it is really a no-go, read further. It is very likely, that you can find and buy astronomy books on Arabic on the Internet. First start w …
- 3,174
3
votes
Accepted
How many light years away is Earth from the closest outer edge of the black hole at the cent...
As @Py-ser already said, there is the very clear information about that, although his link correctly is here.
As we can read there, the distance of this is around 25000 light years, with a precision …
- 3,174
3
votes
Accepted
How loud would a black hole be?
Nothing comes out from the BH (well, with a single known, very small exception).
The accretion disk of the Black Holes most likely has various streams, pressure differences and so in it. Calculating …
- 3,174
3
votes
Can a black hole be torn apart by SMBHs?
No. The total mass of the Black Hole is in the point in its center, but there is no return from passing the event horizon.
The Area theorem (from Hawking) says, that the total area of the event horiz …
- 3,174
3
votes
any proof that stars are born, and die?
An analogy
You can not sit in a forest, and watch as the trees grow, mature and die. You have no time for that, because the trees live typically longer than you.
However, if you are a forester, then …
- 3,174
2
votes
Measuring the size and the geometry of Universe
The relative recent WMAP result shows, the Universe seems infinite.
However, the "is the Universe infinite" question has a hidden problem: it doesn't matter, how far away can we see, we can't be sure …
- 3,174
1
vote
How strong would gravity need to be to prevent star formation
There is no such limit, at least not a meaningful one.
If the gravity would be more strong, smaller hydrogene clouds could evolve to stars, even Jupiter or Earth sized, or much smaller. As you increa …
- 3,174
0
votes
Is our Universe inside a black hole?
No. The metrics look very differently.
The metrics of the the Universe is determined by the FLRW metrics. Its spacelike sections are planar.
The spacelike sections of the spacetime around a Schwarzs …
- 3,174