Linked Questions

0
votes
1answer
60 views

Event-horizon black hole

A object which passes the event horizon need a finite proper time for this. But a infinite far observer wouldn't see that the object passes the event horizon. But if the observer doesn't see this, ...
2
votes
0answers
45 views

How can non-infinitesimal Black holes form in finite time for a distant observer? [duplicate]

Say you are on earth observing a staring hypernova at safe distance from earth. Now as soon as the core collapses to its Schwarzschild radius the singularity would come into existence and so would ...
1
vote
0answers
44 views

How long does it take for the image of an object falling into a black hole to disappear?

From what I've read on other questions and answers, an outside observer cannot see an object fall into a black hole, but rather the image of the object will look like it is stuck on the surface of the ...
1
vote
0answers
37 views

Does a black hole ever fully form to an outside observer? [duplicate]

According to general relativity, I had understood that time appears to slow down when looking into high gravitational fields from afar, so that as a black hole forms, the light from a collapsing star ...
0
votes
0answers
20 views

Can we detect a gravitation field of an object after it failed into a black hole? [duplicate]

Can we detect a gravitation field of an object after it failed into a black hole? Take a simple non-rotating, non-charged black hole and throw a massive object into the black hole: When the object ...
0
votes
0answers
17 views

Do orbiting masses accelerate or decelerate (relative to us) near black holes? [duplicate]

Apologies if this question seems stupid; I was just curious after watching a documentary, and I am not a trained astrophysicist. Simply put, I cannot reconcile the (perhaps misunderstood) facts that ...

15 30 50 per page