Black Hole size comparison ! From 1 to Holy shit factor 100

[kaykay]

There are no blackholes.....

 

[Bilal.]

reccomend to anyone interested

If the time slows down close to the event horizon from our perspective to a crawl, so much so that it would take more than the life of the universe for the object to actually fall into the blackhole, then how did the blackhole grow to this size, heck, how did it even form within the lifetime of the universe in the first place? Shouldn't it's formation timescale also be stretched out, to infinity, from the rest of the universe's perspective?

 

[Providence]

If the time slows down close to the event horizon from our perspective to a crawl, so much so that it would take more than the life of the universe for the object to actually fall into the blackhole, then how did the blackhole grow to this size, heck, how did it even form within the lifetime of the universe in the first place? Shouldn't it's formation timescale also be stretched out, to infinity, from the rest of the universe's perspective?

This is from the perspective of a person who is outside the event horizon. Such bizarre deductions which you are pointing to is happening because the event inside a blackhole cannot be placed anywhere in our timelines of the world. For us, those events virtually don't exist. Hence we see blackhole as a void.

The "blackness" is not because back hole sucks light as it would imply gravity as a force which as per theory of relativity is not the case. Gravity is just the curvature of spacetime.

 

[Bilal.]

This is from the perspective of a person who is outside the event horizon. Such bizarre deductions which you are pointing to is happening because the event inside a blackhole cannot be placed anywhere in our timelines of the world. For us, those events virtually don't exist. Hence we see blackhole as a void.

The "blackness" is not because back hole sucks light as it would imply gravity as a force which as per theory of relativity is not the case. Gravity is just the curvature of spacetime.

That's what I am saying. From "our perspective" the object would take a longer than universe age time to fall into it, so it should not have grown to this size within the observed time scale of just a few billion years.

Of course from the object's perpective the time will flow normally and it will pass through the event horizon, but from the outside observers perpective it will take an eternity.

 

[Providence]

That's what I am saying. From "our perspective" the object would take a longer than universe age time to fall into it, so it should not have grown to this size within the observed time scale of just a few billion years.

Of course from the object's perpective the time will flow normally and it will pass through the event horizon, but from the outside observers perpective it will take an eternity.

Pertinent point is, to us it would seem... but that may not be objective reality !!

 

[Bilal.]

Pertinent point is, to us it would seem... but that may not be objective reality !!

It's all relative, so from the perspective of the outside observer it really would happen, because the relative time will slow down. So from the standpoint of the outside universe, the process (of falling into the blackhole) will take virtually forever.

 

[Providence]

It's all relative, so from the perspective of the outside observer it really would happen, because the relative time will slow down. So from the standpoint of the outside universe, the process (of falling into the blackhole) will take virtually forever.

What is your point ? Who is correct as per your understanding ?

 

[Bilal.]

What is your point ? Who is correct as per your understanding ?

Both are. That's relativity. For the object falling in it would take normal time, while huge amount of time would pass outside. From it's perpective the outside time will accelerate.

 

[Kashmiri Pandit]

@Spectre @Slav Defence @Kashmiri Pandit @applesauce @F-22Raptor

What is this twisted space , which resembles a fabric ( Is it bending of Time or reality ).Ah ! my head hurts !!!
If space is Vacuum , Then why is it so ?

 

[Bilal.]

What is this twisted space , which resembles a fabric ( Is it bending of Time or reality ).Ah ! my head hurts !!!
If space is Vacuum , Then why is it so ?

Because, Empty space is not nothing. Space itself is kinda a fabric. Even in complete vacuum particle pairs can pop into existence and cancel each other and disappear.

 

[Providence]

What is this twisted space , which resembles a fabric ( Is it bending of Time or reality ).Ah ! my head hurts !!!
If space is Vacuum , Then why is it so ?

The notion of time needs to be cleared up before we refer to "space-time".

Space-time is a composite. This can be bent by gravity. Presence of huge mass twists this flat space-time composite into a curved geodesic.

What it effectively means is, time has no absolute meaning per se and there is no absolute order of events which exists. The order of events might change depending on your frame of reference.

And yes space is vacuum implying an absence of matter but the space-time do exists. How so? well for even vacuum to exist, there must be space-time to exist

 

[Providence]

It's all relative, so from the perspective of the outside observer it really would happen, because the relative time will slow down. So from the standpoint of the outside universe, the process (of falling into the blackhole) will take virtually forever.

Hey came across a nice video on youtube !

 

[ito]

The largest Blackhole discovered is S5 0014+81. At the mass of 40 billion suns, it is twice the size of black hole of Phoenix Cluster.

 

[Bilal.]

Hey came across a nice video on youtube !

That's really good video! So he explains the same thing, that from our/outside observer point of view a falling object will never cross the event horizon. Which brings us back to the first question, how does this thing form within a finite amount of time in the first place and grow in size too?

 

[Providence]

That's really good video! So he explains the same thing, that from our/outside observer point of view a falling object will never cross the event horizon. Which brings us back to the first question, how does this thing form within a finite amount of time in the first place and grow in size too?

I can't get your point of contention ! Could you clearly state them again !