All these years and I thought I was the only one who knew he was a huge fake. Now if more people will realize that he's not being truthful in his claims of having studied Christianity...

Black Holes are known to emit Gamma Radiation, it's how we know for certain that they exist. (that and their gravitational signature)

http://www.cosmosmagazine.com/news/2710/most-violent-black-hole-jets-are-gamma-ray-beacons

You didnt even read the articles I linked.

Your wrong. Hawking evaporation is exactly the mechanism by which black holes emit particles, its two different phenomena as quite_2008 pointed out, but both contradict the statements made by abra, the pretender.

Abra is wrong, he so often thinks he has all the answers from whatever web based courses he takes, then comes in here claiming to be a scientists.

You all should read more real research and less mingle pretender drivel.

math

you can't prove anything without the math

when someone shows verifiable calculations for their (crazy) hypothesise then I'll start paying attention

in the meantime I mostly just scan these threads and shake my head at the stuff some people believe

and you know the very post that abra jumped on was mentioning a new angle of resaerch that is quite interesting even if new, in just another thread he said there is no new science.

I think that is becuase he continues to read his old science books, or web based course but not modern research papers.

I make no claims to any authority on cosmology, my field of research is nano particulates.

Currently I am studying the interactions of patchy particles during self assembly. They form all kinds of interesting structures which may lead to many new technologies.

yeah it's a thing you see often

people develop their own ideas as to the nature of the universe and then try to interpret all the science and research to fit their conception

I'm not much into astronomy or cosmology. I was as a kid until one day I realized it would take an entire lifetime to just travel to edge of our solar system. All that cool stuff out there is unreachable by us for the next few hundred years. So I lost interest

I'm more into the micro level and characteristics of wave front propagation and radiometric stuff

The most massive known black hole in the universe has been discovered, weighing in with the mass of 18 billion Suns. Observing the orbit of a smaller black hole around this monster has allowed astronomers to test Einstein’s theory of general relativity with stronger gravitational fields than ever before.

The black hole is about six times as massive as the previous record holder and in fact weighs as much as a small galaxy. It lurks 3.5 billion light years away, and forms the heart of a quasar called OJ287. A quasar is an extremely bright object in which matter spiralling into a giant black hole emits copious amounts of radiation.



But rather than hosting just a single colossal black hole, the quasar appears to harbour two – a setup that has allowed astronomers to accurately ‘weigh’ the larger one.

The smaller black hole, which weighs about 100 million Suns, orbits the larger one on an oval-shaped path every 12 years. It comes close enough to punch through the disc of matter surrounding the larger black hole twice each orbit, causing a pair of outbursts that make OJ287 suddenly brighten.

General relativity predicts that the smaller hole’s orbit itself should rotate, or precess, over time, so that the point at which it comes nearest its neighbour moves around in space – an effect seen in Mercury’s orbit around the Sun, albeit on a smaller scale.


BRIGHT OUTBURSTS

In the case of OJ287, the tremendous gravitational field of the larger black hole causes the smaller black hole’s orbit to precess at an incredible 39° each orbit. The precession changes where and when the smaller hole crashes through the disc surrounding its larger sibling.

About a dozen of the resulting bright outbursts have been observed to date, and astronomers led by Mauri Valtonen of Tuorla Observatory in Finland have analysed them to measure the precession rate of the smaller hole’s orbit. That, along with the period of the orbit, suggests the larger black hole weighs a record 18 billion Suns.
A couple of other black holes have been estimated to be as massive, but their masses are less certain, says Valtonen. That’s because the estimates were based on the speed of gas clouds around the black holes, and it is not clear whether the clouds are simply passing by the black holes or actually orbiting them.

But Tod Strohmayer of NASA’s Goddard Space Flight Center in Maryland, US, says he is not convinced that Valtonen’s team has really measured the mass of the large black hole in OJ287 accurately.
That’s because only a handful of the outbursts have been measured with high precision, making it difficult to determine if the precession scenario is responsible for the outbursts. “Obviously, if subsequent timings continue to agree with the model, then that would provide further support,” he told New Scientist.



NO LIMIT

Just how big can black holes get? Craig Wheeler of the University of Texas in Austin, US, says it depends only on how long a black hole has been around and how fast it has swallowed matter in order to grow. “There is no theoretical upper limit,” he says.

The new research also tested another prediction of general relativity – that the black holes should spiral towards each other as they radiate energy away in the form of gravitational waves, or ripples in space. This radiation affects the timing of the disc crossings and their accompanying outbursts.

The most recent outburst occurred on 13 September 2007, as predicted by general relativity. “If there was no orbital decay, the outburst would have been 20 days later than when it actually happened,” Valtonen told New Scientist, adding that the black holes are on track to merge within 10,000 years.

Wheeler says the observations of the outbursts fit closely with the expectations from general relativity. “The fact that you can fit Einstein’s theory [so well] … is telling you that that’s working,” he says.

wow

a mass of a hundred million suns with a period of 12 years. that's FAST

precession is cool stuff

the best example of that is to spin a bicycle wheel sitting on a bar stool. if you try to turn the bicycle wheel it'll force you to spin around on the bar stool. on a spinning object, force applied is translated 90 degrees



that is how a north seeking gyro compass works. a weight is applied to the bottom and the rotation of the earth translates the precession and forces it to align itself to the north pole (true north not magnetic)

Ahh now I am starting to understand this a bit. Thanks Quietman for taking the time to post these pictures. Very interesting

n/p

I thought I was kinda taking the thread off track but I do that in real life all the time too

it's the ADD thing

39 degrees against a mass of 100 million suns is a LOT of precession. kind of a testament to how much gravity there is in the bigger black hole

Don't worry about the threads I make. You can say whatever you like. I never complain about anything. I am easy-going non-debater type guy as most know.

Actually I am also known to be off subject often. Usually because I don't understand what everybody is talking about on these science and philosophy threads

but I am okay with it.

I find a black hole scary to tell you the truth. I am glad that they are no where near our universe, but then again at the rate of speed they go you wonder if they can just appear quickly and suck us right up in seconds.

I figure we wouldn't feel anything right? It would be so quick if we got sucked up or whatever term everyone has here.

Blackholes are scary!

I wonder what the reason of their existence is in the first place.

Then I wonder if perhaps we are in a blackhole without knowing it?

Well don't mind me, I don't know the answers. Perhaps someone will give a theory or explanation that rings true.

if you fall into a black hole the gravity differential is so much that the gravity on your head (if you go in head first) would be a thousand times greater than the gravity on your feet

which would just shred you into your component atoms (and then the same effect would even destroy the atoms) so fast you would never know

Well that is certainly relieving. I won't feel a thing!

Take a bowl and put a piece of plastic wrap tightly over the lip, so that the whole thing is covered. Now push your finger into the plastic, so that it stretches down, but don't push so hard that you create a hole. That is how gravity works (but gravity is 3d, not 2d). Gravity is literally a slope in the shape of space that causes objects to fall towards a source of gravity.

A black hole is a point that is pushed down so hard that the slope is inescapable.

A black hole is created by a star running out of fuel. While a star is burning, the fission pushes out and gravity pushes in. The two forces are held in check. As the rate of fission reduces, the outward pressure reduces and the star collapses. If the star has enough mass and the burn out happens the right way, the end result is a black hole.

We aren't living in a black hole...at least if we are, then most of what we believe we know about the universe is wrong.

I mean it is told that the earth revolves around the sun at a speed of 66,600 miles per hour. I could be off a few hundred miles or more, but the point is that you don't really feel it at all!

I mean isn't that amazing by itself? Of course if I spin in circles in my room, I get dizzy and I sense that the earth is moving very fast or so it seems.

I mean 66,600 miles and you can't feel it! Wow this planet is big and it isn't even the biggest we know off.

It makes you wonder how fast a black hole travels?

That is good to know. I guess I just came up with that question just because they are so huge these black holes carrying billions of suns with them. Just unimaginable isn't it. At least for me it is.

Thanks for the lesson.

fast haha

many of the black holes are also quasars and are spinning (like the earth) on their axis. we can measure the periodicity of some of em cause the quasar jet points at us during the spin. Some of em spin a couple hundred times a second. and if you imagine how BIG the black hole is that is a mind boggling speed

It all makes me feel rather.... um... small.

I have read a little bit about these "mini black holes" Jeanie was talking about

I think they aren't teally black holes but more of "singularities". it's somehow tied up with "zero point energy" but I dont really understand it. I don't have the math

if that doesn't

this will

I thought that Flash was Fast, but he has nothing against the speed of a blackhole!