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Space and Blackholes a question

Blogs > {CC}StealthBlue
Post a Reply
{CC}StealthBlue
Profile Blog Joined January 2003
United States41117 Posts
May 02 2009 07:28 GMT
#1
So I just watched a show called "The Universe" and the subject of the episode was Blackholes and they kept showing a example by having a large sheet of rubber and throwing like marbles, then a bowling ball and showing the effects of gravity which was the bowling ball rolling to the center then the marbles and other lighter objects circling around it all making slight or bigger compressions on the rubber.

Does this mean that a Blackhole is literally so heavy and so strong that it literally tears through space. Like if an object was to fall through the rubber because it was so heavy? That would be the equivalent of a black hole in space?

Like this:



*****
"Smokey, this is not 'Nam, this is bowling. There are rules."
Jayme
Profile Blog Joined February 2009
United States5866 Posts
Last Edited: 2009-05-02 07:45:03
May 02 2009 07:43 GMT
#2
It is HYPOTHESIZED that a black hole has such intense gravity that it completely distorts space/time as we know it until it's unrecognizable.

The plain fact of the matter is that we don't know. We don't know the effect infinitely strong gravity has on space time. I'm almost certain though that space time as we know it is pretty much completely different at a singularity point.

In your example it's equivalent to dropping something so heavy on the rubber that it stretches it to it's ABSOLUTE breaking point such that a single iota more of force would cause it to tear. Blackholes could stretch it that for or possible completely tear it, we're not sure.
Python is garbage, number 1 advocate of getting rid of it.
Guilford
Profile Blog Joined August 2008
Australia290 Posts
Last Edited: 2009-05-02 09:19:17
May 02 2009 08:05 GMT
#3
No one have traveled there (or come back alive) so we don't know about that. The gravity of black holes sure are great but to what extend is still unknown and many physics theories can not be used in the condition inside the black hole. From many documentaries I have watched, they are like what you said thing would be completely teared up.

So pretty much there are still many mysteries regarding to the black holes.
Being forgotten is worse than death.
Motiva
Profile Joined November 2007
United States1774 Posts
May 02 2009 09:32 GMT
#4
In theory in the center of a blackhole, density is infinite, gravity is infinite, and time is infinite. A blackhole is usually more loosely defined as something for which the gravitational pull exceeds the speed of light.
REDBLUEGREEN
Profile Blog Joined June 2008
Germany1903 Posts
May 02 2009 16:53 GMT
#5
On May 02 2009 18:32 Motiva wrote:
A blackhole is usually more loosely defined as something for which the gravitational pull exceeds the speed of light.


I think you mix something up here. gravitational pull is an acceleration it can not have the speed of light. what you mean is the escape velocity of a black hole exceeds the speed of light, right?
SpiritoftheTunA
Profile Blog Joined August 2006
United States20903 Posts
May 02 2009 17:13 GMT
#6
the escape velocity from the inside to the event horizon must at least be the speed of light, that's the definition

some people call it a rip in space-time, some people call it a hole so deep it's impossible to get out

what motiva's probably referring to is a singularity (which may or may not actually be at the center of a black hole), but "gravity is infinite" and "time is infinite" are misleading and don't really make sense
posting on liquid sites in current year
Motiva
Profile Joined November 2007
United States1774 Posts
May 02 2009 19:22 GMT
#7
On May 03 2009 02:13 SpiritoftheTunA wrote:
the escape velocity from the inside to the event horizon must at least be the speed of light, that's the definition

some people call it a rip in space-time, some people call it a hole so deep it's impossible to get out

what motiva's probably referring to is a singularity (which may or may not actually be at the center of a black hole), but "gravity is infinite" and "time is infinite" are misleading and don't really make sense


yea i was referring to escape velocity, and singularity ^_^ I dunno, just seemed to be more of what he was looking for?

and obviously simple generalized statements are misleading, what actually happens is all theory and is the modern forefront of physics with the attempted combination relativity and quantum mechanics....


i suppose I could have said that the spacetime continuum becomes so distorted that those things insofar as we can tell appear to be infinite.
ulszz
Profile Blog Joined June 2007
Jamaica1787 Posts
May 02 2009 19:39 GMT
#8
black holes are bugs in the matrix lul
everliving, everfaithful, eversure
VorcePA
Profile Blog Joined August 2008
United States1102 Posts
May 02 2009 20:11 GMT
#9
Keep in mind everything we know about black holes is completely theoretical. We can't directly observe them because all forms of measurement (the easiest one being light) are absorbed in to it.
Shitposting
Motiva
Profile Joined November 2007
United States1774 Posts
May 02 2009 21:38 GMT
#10
On May 03 2009 05:11 VorcePA wrote:
Keep in mind everything we know about black holes is completely theoretical. We can't directly observe them because all forms of measurement (the easiest one being light) are absorbed in to it.


I can't help myself.

In your first sentence the words everything and completely are absolutely not true. Well completely theoretical in the sense that friction and gravity, or evolution are theoretical. Relgious folk always have that problem withevolution. a Scientific theory is something very different than a non-scientific theory.

We do know some things about blackholes, and we know some of it with a very great deal of certainty. We can determine the charge, mass, and spin of a black hole. We have determined details about the entropy of blackholes, and how something with such a distorted spacetime continuum can even have a charge. Obviously there are problems gathering direct evidence due to the nature of the problem, but to say we don't know anything because -all- forms of measurement are absorbed into is not only just wrong, but a great disrespect to the majesty of science.

Meh
SpiritoftheTunA
Profile Blog Joined August 2006
United States20903 Posts
Last Edited: 2009-05-03 20:21:12
May 03 2009 20:20 GMT
#11
On May 03 2009 04:22 Motiva wrote:
Show nested quote +
On May 03 2009 02:13 SpiritoftheTunA wrote:
the escape velocity from the inside to the event horizon must at least be the speed of light, that's the definition

some people call it a rip in space-time, some people call it a hole so deep it's impossible to get out

what motiva's probably referring to is a singularity (which may or may not actually be at the center of a black hole), but "gravity is infinite" and "time is infinite" are misleading and don't really make sense


yea i was referring to escape velocity, and singularity ^_^ I dunno, just seemed to be more of what he was looking for?

and obviously simple generalized statements are misleading, what actually happens is all theory and is the modern forefront of physics with the attempted combination relativity and quantum mechanics....


i suppose I could have said that the spacetime continuum becomes so distorted that those things insofar as we can tell appear to be infinite.

generally, people assume the infinities that come out of the combination of GR and QM are the result of bad math.... like... probabilities above 1, etc, etc... not actually physically interpretable infinities...

also yeah what vorce PA made no sense because experiments and observation are part of theory... it would make slightly more sense if he said "hypothetical" but he'd still be wrong because we've observed some properties of black holes (i.e. their radiation)
posting on liquid sites in current year
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