Question about ';black holes'; - even if there was just ONE black hole, wouldn't it be true that NOTHING exists?

Let me put it this way... Let's say you have a black hole (which, in reality, should be called a ';black ball'; or something to more accurately describe its true nature). It is so powerful that even light doesn't move fast enough to escape its powerful gravitational pull - the definition of a black hole. Moreover, since a black hole is, in actuality, a black BALL, wouldn't it be attracting EVERYTHING from every spherical angle and not just one facet?





If that is so, then as it pulled in more things, its own mass would grow, giving it an even greater gravitational pull.... thus allowing it to gravitationally attract things that are even FARTHER away. And, once it adds the mass of those newly attracted objects to its own mass, then it has an even greater gravitational potential. etc.... and so the cycle would continue until eventually, this ';black hole'; would have consumed the entirety of existence.





Presumably, this would happen insanely quickly as well (hell, even LIGHT can't travel fast enough to escape its pull!). So, if black holes exist, then how can there be any existence of......... anything? Why aren't we all just smushed to an infinitely massive sphere? Or is the entirety of all that exists continually approaching this massive sphere?





Thanks, I'll pick a best answer TODAY!Question about ';black holes'; - even if there was just ONE black hole, wouldn't it be true that NOTHING exists?
No. A black hole does NOT ';suck in everything around it.'; The region where even light cannot escape is only a few kilometers across. If the Sun collapsed to become a black hole today, its gravitational effect on Earth and the planets would not change. Not one bit.





Your argument about attracting more mass and accumulating more gravity applies just as well to ANYTHING, not just black holes, the Earth for instance. And it fails for the same reason: there's not that much mass in space to attract.Question about ';black holes'; - even if there was just ONE black hole, wouldn't it be true that NOTHING exists?
well no becouse from what they say it leads to other dimensions oops i mean could but we dont know wer stuff goese and y do u think there r galaxys? there there becouse a blackhole is in the middle of each one also blackholes r more like unseeable kinda stars with alot more pull.
Gravity weakens exponentially over distance. Therefore, after the black hole 'sucks' in everything around it, the gravity isn't strong enough to reach across the vastness of space.
You are essentially correct.


If a black hole could exist it would eventually accrete all the matter in the universe and sit for eternity doing nothing.
you will like this!!





http://spaceventurers.blogspot.com/searc鈥?/a>
Not to mention that the universe is expanding, so this is less possible (if thats possible) everyday
You make many errors of thought.


You apparently haven't heard that we exist in a 4-D universe, not 3-D.


That is, time is a dimension and is also warped by gravity. So whatever you mean (I doubt if you know) by ';insanely quickly'; is: 1)wrong and 2) contrary to the physics we use to understand black holes


Also as others have said, the mass of a black hole is the same as the mass of the objects which created it,: since gravity is ONLY a fucntion of mass, (we'll ignore density as I don't pretend to understand the General Relativity involved), then the ';pull'; from a black hole is NO MORE than it would be from the star (or whatever) before it collapsed. This is a common ';dumb mistake'; that the uninformed make. The idea Black Holes ';suck in'; things like a vacuum cleaner is Hollywood crap. Make no mistake, the distribution of mass in the Universe is because of Gravity. But black holes, I believe, have had little effect in that distribution. Cosmologists?


Here's one I haven't got an answer to: I have read that it takes an infinite amount of time for matter to fall from orbit to the Event Horizon because of time dilation (relative to an outside observer). Lets take this a step further and ask whow long does it take for a star to collapse into a black hole if the first area of ';singularity'; with an event horizon causes the rest of the star to collapse into it in ';dilated time'; - maning that it takes forever for the black hole to form. So, he asks, why do we think these things exist? (rather than being in the process (which will take forever) of being created).
Black holes are not the cosmic vacuum cleaners that people make them out to be. Gravity weakens quite a bit with distance and it's only once you pass the event horizon that it becomes overwhelming enough to prevent escape.





The event horizon of a black hole is the point past which nothing can escape. This zone of 'no escape' will never be large enough to trap everything in the universe, as it will never be larger than the core of the original object that collapsed, except in cases of supermassive black holes like the one that is believed to be at the centre of the galaxy. Even in the case of supermassive black holes, the event horizon doesn't stretch very far into space. Outside of the event horizon, the gravity isn't all that much stronger that that of a large star, meaning that you'd most likely be pulled into orbit around it (in a complicated orbit called a 'rosetta') if you came close. Gravity decreases in power the further you get from its source and the its reach only stretches so far, meaning that it's quite possible not to be affected by a black hole if its far enough away. It certainly wouldn't trap light or any other form of energy. The actual event horizon of an average black hole is usually only as large as a few km across, and most of them are smaller than that. Even a very large one would only stretch for less than 1AU. It's incredibly rare for matter to pass this invisible barrier, usually ending up in an orbit around it instead. You have to remember that the distances between matter in space are incredibly large. Unless the event horizon of a black hole was infinite in size, it couldn't reach everything in the universe.





For a medium black hole (the majority are only microscopic and exist for a fraction of a nanosecond) to destroy the planet, it would have to pass right into earth's atmosphere before it could destroy us. Even a large black hole would have to pass a good ways into our solar system to reach us.





In addition, black holes are not eternal. They eventually collapse with time.





Our sun orbits around the centre of our galaxy which, as I said, is probably a supermassive black hole. Along with everything else in the galaxy, we orbit around it in a rosetta pattern.
I think your answer comes down to finding out just how strong a gravitational pull has to be before it can absorb light. I truthfully don't know if this is known or not. But, if it has a set value, and gravity exponentially decreases with distance, there should be a specific distance concerning how far away you have to be from one to escape its pull. I guess for us to still be here, we know it has to be under a certain amount, you know?





I get what you're saying, though. But what you're saying makes me think there is a finite value to the pull of a black hole. If it were infinitely powerful, then what you say would be true, and we'd be goners. Either that, or the entire scientific community is wrong. :-)
No, there are other gravitational forces with which a black hole will have to compete. Black holes are not the only objects attracting and engulfing things up. Anything with mass will do as well.





That is not to mention that the gravitational force reduced by 1/r^2 of the distance so, black holes are massive alright, but they are so far away that the gravitational pull is not enough to cause all the matter in the universe to collapse into it. The universe would have to be very very small (which it isn't) for all the objects with mass to collapse into one huge heap.