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Post by mrfatso on Mar 6, 2017 8:20:54 GMT
Yes I am really talking about Stellar Balck holes, other types can theoretically form as well.
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Post by Lokifan on Mar 6, 2017 8:33:19 GMT
Yes I am really talking about Stellar Balck holes, other types can theoretically form as well. Yes, sorry about that. I was being a bit pedantic. I just wanted to say that how a black hole forms is not as important as what it means in the course of this discussion. The singularity is just such a weird idea that I've been fascinated by the concept. You can't ever land on the surface of a black hole, for example, because it has no surface--it's a one dimensional point in space, with no height, width, or depth. As such, you can't have a part of a black hole because it's infinitely small, and thus indivisible. Like I said, ordinary physics goes out the window. |
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Post by silverdragon on Mar 6, 2017 11:15:11 GMT
Yes I am really talking about Stellar Balck holes, other types can theoretically form as well. Yes, sorry about that. I was being a bit pedantic. I just wanted to say that how a black hole forms is not as important as what it means in the course of this discussion. The singularity is just such a weird idea that I've been fascinated by the concept. You can't ever land on the surface of a black hole, for example, because it has no surface--it's a one dimensional point in space, with no height, width, or depth. As such, you can't have a part of a black hole because it's infinitely small, and thus indivisible. Like I said, ordinary physics goes out the window. There is a point in space where if you shine a strong beam "past" that, around a blach hole, the light bends, and beyond that, the light bends so that it spirals into the hole, at the point where it spirals into the hole, that is what we call the event horizon, at that event, they do not believe, as in theorise, anything will have the power to esacpe, as you need an escape velocity faster that light, and, as the theories go, we just dont have the ability to create the amount of energy [at this point in time] and no one we know has the energy reserves to accelerate beyond the speed required to "escape". As I say, its all theory, because no o9ne yet has done anything close to that. It is also theorised that you had better have that beam of light shining out front, because as soon as it starts to bend, GTF outa there, any further towards that event horizon, your going to be already being affected by the gravitational pull. In fact, you probably are already being affected, by the theoretical black hole they have been looking for at the centre of our own galaxy... of course we are on a circuit around that, in billions of years, out here in the unfashionable parts of the western arm of the galaxy, but its already affecting the orbit of our Sun around the galaxy, and therefore, the orbit of ourselves around the sun. No we dont "feel" it.... But maybe we can see it?. They have been looking with very strong telescopes, Very LARGE arrays, towards the centre of our galaxy, and I believe they have seen events that sort of describe the presence of a massive gravity field there, because its affecting the orbit of the stars and systems close by. Of course they are also looking for the possible presence of "dark" matter, because, their sums dont add up... there seems to be far too much gravity around for the matter we can already see. The event horizon they theoretically predict is for light speed, what is it at the sped of say a ford transit van?.. I suspect the speed of a transit van to be a few million miles further away than the light horizon?.. |
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Post by the light works on Mar 6, 2017 13:33:12 GMT
perhaps it is time to move the black hole discussion to its own thread?
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Post by Lokifan on Mar 6, 2017 16:08:50 GMT
perhaps it is time to move the black hole discussion to its own thread? I think you're right. It's way OT for a TV myth. Moving it now. |
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Post by Lokifan on Mar 6, 2017 16:47:38 GMT
<snip> In fact, you probably are already being affected, by the theoretical black hole they have been looking for at the centre of our own galaxy... of course we are on a circuit around that, in billions of years, out here in the unfashionable parts of the western arm of the galaxy, but its already affecting the orbit of our Sun around the galaxy, and therefore, the orbit of ourselves around the sun. No we dont "feel" it.... But maybe we can see it?. They have been looking with very strong telescopes, Very LARGE arrays, towards the centre of our galaxy, and I believe they have seen events that sort of describe the presence of a massive gravity field there, because its affecting the orbit of the stars and systems close by. Of course they are also looking for the possible presence of "dark" matter, because, their sums dont add up... there seems to be far too much gravity around for the matter we can already see. The event horizon they theoretically predict is for light speed, what is it at the sped of say a ford transit van?.. I suspect the speed of a transit van to be a few million miles further away than the light horizon?.. The amazing thing about gravity is that everything in the universe is being pulled at by everything else in the universe. Theoretically, if there were only two rocks in the universe, and they were at opposite ends of the universe travelling at opposite directions, they'd still attract each other and, given enough time, eventually collide. When matter comes near a black hole, it tends to fall into orbit around it. Depending on the speed and angular velocity, it may take a while to fall past the event horizon, instead orbiting a while just like one of those coins rolled into this arcade game:  As matter gets close to the event horizon, the gravity differential is so intense it tends to tear it apart into its component bits. It also gets hit by everything else falling into the black hole, and these two events produce blasts of x-rays. We hunt xray sources to find black holes. Looks like there are a lot of them, according to this: Deepest-Ever X-Ray Image of Space Captures Countless Black HolesFunny you should mention dark matter--a friend of mine is working with a physicist whose specialty was researching black matter before he took his current job. He describes a detector built in a mine in Canada that is filled with a liquid argon medium that is supposed to detect collisions between dark matter and regular matter by sensing particles thrown off by such a collision. Given the statistical probability of such collisions is about one atom per year, the physicist says that it's virtually impossible to tell if any collisions occur because isolating error sources from real collisions is so difficult. So, the physicist says that even if they get data from the experiment, he won't believe it himself!  |
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