black holes

[Mano]

Good thread on Black Holes.

I have been reading articles on this phenomena for a long time. There is a
Super Massive Black Hole at the center of our Milky Way that will one day
merge with an even bigger Black Hole in the center of the Andromeda Galaxy.
We are in no danger of any collision because the stars and systems around them are
billions of miles apart.

Morgan Freeman's Through the Wormhole, and How the Universe Works
have both presented really good programs on this topic and have pointed out that Black Holes
go through phases. Currently the Black Hole at the center of our galaxy is in a dormant state.
Did it run out of fuel to consume or is there another reason why it is not feeding that is yet to be explained?

There are allot of questions about this topic that will not be explained until the day we
can send probes into this phenomena. When a super massive Black Hole is feeding it may produce a phenomena
called a Quasar where extreme radiation is blown out from both poles. The scientists  say the energy being released is coming from
the event horizon and not the center of the Black Hole.

Why does it flatten out to form a accretion disk?

If matter is totally disintegrated and changed into energy once passing through the event horizon, then what is creating the
gravitation field that warps time-space? The Black Hole is not full of matter. I have not seen anyone explain this to date. Scientist tell us nothing can travel faster than
light, except for the fabric of time space which is expanding and accelerating faster than light speed.

Does a Black Hole really create a Singularity?

Allot of questions, I know but it is a fascinating topic that will be debated for a very long time.

The M-Theory mentioned in this post is also very interesting. The Ancients of India had a similar theory.


 
Mano

[Vulcan]

If anyone wants to study a black hole close up you can borrow my wallet.

[moot]

See Rule #2

[mechanic]

See Rule #2

[moot]

I am calm and that's what you just can't get. You need to realize that just because I can speak your language doesn't mean I think like you.  I don't care about you or your "feelings" for me; that's not hate or whatever crap, it's simply absence of caring.  We have nothing in common and whether you're slagging off clueless anti science rants, proposing witchcraft in Morpheus' accident notice thread, telling me you "like me" better because I did something as a stupid kid that you fathom makes us linked somehow or that if you "don't like" me it justifies antagonizing with that petty schadenfreudian glee, or come into a thread where I and other simply pass along bits of fairly well established conjecture and pretend that calling these informational FYI's are "know it all" and somehow injurious to some emotionally constipated kid WITHOUT any evidence to back up your scientific assertion (cause that's what you're doing as soon as you pretend to speak with authority on the credibility of scientific conjecture that neither Bozon or RTHolmes or I came up with), it's always the same kind of rhetorical excuses for your bleeding heart agenda.

Scientists usualy end up unhappy, unappreciated and dissatisfied with the world they are in.

sophomoric crap.  What's next, smokers are unkempt misfits?  Frenchies smell and don't shave armpits?  

Untill then, your words are merely the sum total of studying someone else's theory which could easily count for nothing at the point of the next scientific breakthrough.

More sophomoric platonics.  What else ?  That every post in this thread is "just, like, your opinion, man" ?  No kidding.  Of course everything everyone posts is their opinion.  Dedalos asked a question and it was answered.  All you can contribute along with your "know it all" condescension is .. what?  No evidence whatsoever to substantiate the dubiousness of those conjectures we referred to, other than some textbook sunday philosophy.

All I am saying is that just because we think penguin is a teenager does not mean he should shut up and listen to the 'proper adults' acting like know-it-alls.

Show me where someone in this thread acts like a Know it all.  And define that beyond its vague face-value meaning will ya?  

you're all giving penguin such a hard time.

Show this.  Where's the evidence I gave Penguin a hard time in this thread?  You brought it up, now back it up.

[mijoieau]

Penguin   
Spend allot more time chasing girls as sitting on a computer talking BS will not get you anywhere even the boys will not listen to you after a time.
The theory you should study is life its not as complex as black holes and a heap more fun, get outside and into deep trouble and get 2 girls at the same time as its not that hard, the i know it all gets nothing but the guy that listens gets lots as thats what girls like so learn that now and the girls are not that difficult even the very pretty ones.
Be good forget about theories without any real meaning to your life and push it some and then you are learning and until you try you will never know whats out there but talking BS will only get you into big trouble.
Forkit

[bozon]

Chasing girls will only end with broken hearts for all involved, and probably some sort of lawsuit against me. 

That is a common mistake. Chasing girls is hard and will make you sweat. Trap them instead.

[Penguin]

That is a common mistake. Chasing girls is hard and will make you sweat. Trap them instead.

Literally?  As in dig a 10 foot hole and fill the bottom with pungee sticks? 

-Penguin

[bozon]

Why does it flatten out to form a accretion disk?

Angular momentum conservation and minimum energy state. Gas, unlike stars is collisional (well, stars CAN colide it is just very improbable). The stable orbits for a particle around a central large mass are elliptical, but if they cross each other's paths they will collide. After a few collisions the orbits will start to average out. Since it is very likely that there will be some preference to a rotational direction (initial total angular momentum) this is the rotation plane the gas particles will end in. They will still collide with each other, but the relative speeds will be small (the local temperature). The thickness of the accretion disk will depend on the temperature and turbulence in the disk (these create dispersion in the particle trajectories so they do not all move on a perfect plane.

If matter is totally disintegrated and changed into energy once passing through the event horizon, then what is creating the
gravitation field that warps time-space? The Black Hole is not full of matter. I have not seen anyone explain this to date. Scientist tell us nothing can travel faster than
light, except for the fabric of time space which is expanding and accelerating faster than light speed.

The passage though the event horizon is undramatic. If you could survive it, you would still see the the outside world and receive transmissions - but the wavelengths will get shorter and shorter so radio becomes visible light, then X-ray, etc. Your outgoing transmissions will fade into longer and longer wavelength as you approach the horizon and completely fade once you cross it.

So mass does not become energy - it is a kind of energy already. What creates gravity is not mass - it is energy in any form. so there is no difference if the energy come into the hole in the form of mass or radiation.

Does a Black Hole really create a Singularity?

That depends on what do you call singularity.

The M-Theory mentioned in this post is also very interesting. The Ancients of India had a similar theory.

The string theory and all its derivatives is an extremely hyped idea that has not produced a single new measurable prediction. They are currently in the realm of a mathematical exercises. Maybe in the future.

[bozon]

Literally?  As in dig a 10 foot hole and fill the bottom with pungee sticks? 

-Penguin

No no no, this will damage them. They have a lovely skin that you'd want to keep intact. You need something soft at the bottom.

[Penguin]

No no no, this will damage them. They have a lovely skin that you'd want to keep intact. You need something soft at the bottom.

One question, is this "for t3h lulz" or are you seriously suggesting that I use pillows and not pungee sticks?

-Penguin

[MrRiplEy[H]]

That is a common mistake. Chasing girls is hard and will make you sweat. Trap them instead.

"It rubs the lotion on it's skin"

[EskimoJoe]

"It rubs the lotion on it's skin"

[MrRiplEy[H]]

Earth at the time you pointed the telescope at the mirror.

You mean earth two years before the event of pointing the telescope to the mirror. The light reflected from earth will have to travel a year to reach the mirror and reflected light will have to travel another year to return back.

[mechanic]

   More sophomoric platonics.  What else ?  That every post in this thread is "just, like, your opinion, man" ?  No kidding.  Of course everything everyone posts is their opinion.

I don't like it when you quote half my words and not the other half. I sure it makes it easier for you to argue though.

And this bit I just [snip] quoted of yours, in the same fashion, is exactly my point. Not really posting your opinion ever, moot, just posting things you have read of someone else's.

I don't even know what a sophomore is.