Black Holes

[Norton]

Pretty decent Nova episode on Black Holes here:

http://www.pbs.org/wgbh/nova/space/black-hole-apocalypse.html

http://player.pbs.org/viralplayer/3008168895/

premiered on Jan 10th

 

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Friends and colleagues from the University of Cambridge have paid tribute to Professor Stephen Hawking, who died today at the age of 76.
Professor Hawking broke new ground on the basic laws which govern the Universe, including the revelation that black holes have a temperature and produce radiation, now known as Hawking radiation.

Gone but not forgotten

 

[StrayKAT]

What's inside a black hole seems like a pointless question, since nothing with "consciousness" would survive such abuse anyways.

edit: Err.. what I'm getting at brings a Sagan quote to mind. "We are a way for the Cosmos to know itself." The wonders of the universe are complete when our own perception is finally a part of the experience. But the damn Black Hole is one place consciousness can't go.. it'll never know this place.

But then, perhaps a Black Hole is not part of the Cosmos anyways, and therefore it's appropriate that we can't know it.

 

[dont whant to set it"']

Sad news indeed, but as child hearing from telly I did not get the fuss about Prof. Stephen Hawking and merely saw the portraying as a gimmicky pr stunt and what not.
le: @StrayKAT; I have pictured a way in which a black hole is a way (maybe only way) a higher entity can observe the " Universe" in one if my Petri dish universe
type scenario.

 

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@StrayKAT

Have you heard of Vyacheslav I. Dokuchaev's theory Is there life inside black holes?
He implies that advanced civilization may exist within supermassive black holes like the one at the center of our Galaxy.

Lee Smolin in his paper Cosmological Natural Selection assumes that the Universe was born inside of a black hole.

See videos:

 

[StrayKAT]

@StrayKAT

Have you heard of Vyacheslav I. Dokuchaev's theory Is there life inside black holes?
He implies that advanced civilization may exist within supermassive black holes like the one at the center of our Galaxy.

Lee Smolin in his paper Cosmological Natural Selection assumes that the Universe was born inside of a black hole.

See videos:

Well, that was interesting... I'm speechless. And I'm not saying that's positive or negative

 

[Drone]

Lol I see.

It's quite speculative but Kip Thorne, Stephen Hawking, Joseph Polchinski and other cosmologists have theories that one can survive beyond the event horizon. But nobody has any idea how to test these theories. It all involves Cauchy horizon, anti-de Sitter space and equations of General Relativity.

I sort of understand math part of these theories but QM and GR aspects went over my head

 

[quirky]

What's inside a black hole seems like a pointless question, since nothing with "consciousness" would survive such abuse anyways.

edit: Err.. what I'm getting at brings a Sagan quote to mind. "We are a way for the Cosmos to know itself." The wonders of the universe are complete when our own perception is finally a part of the experience. But the damn Black Hole is one place consciousness can't go.. it'll never know this place.

But then, perhaps a Black Hole is not part of the Cosmos anyways, and therefore it's appropriate that we can't know it.

I don't agree with you. I think that black holes can be survived and I deeply believe that extraterrestrials use it for interstellar traveling.

 

[dont whant to set it"']

Could it be that I do not agree with you, too wich I say if "we"(as humans, permitedly) haven't musterd it does not meant an other has not.

 

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New Study Suggests Tens of Thousands of Black Holes Exist in Milky Way's Center

Read

 

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[jihadjoe]

So I got to watch that PBS Nova documentary (with Niel Degrasse Tyson!) mentioned at the top of this page.

It seems experts pretty much agree with the "direct collapse" scenario for the creation of supermassives at the centres of galaxies. Huge gas clouds collapse straight into a black hole, skipping star formation entirely could bypass the Eddington Limit which would normally make black holes of such mass impossible at this point in time.

Rather happily the PBS website for the film has a transcript, making quotes easy!

http://www.pbs.org/wgbh/nova/space/black-hole-apocalypse.html

JANNA LEVIN: Some scientists are now asking, "What if there's a way to create a black hole that's already much more massive from birth, giving it a head start?"

PRIYAMVADA NATARAJAN: If there was a physical mechanism that would allow you to make a black hole seed, which was much more massive from the get-go, then the timing crunch is not as much of an issue and the growing problem is not as acute.

JANNA LEVIN: The answer, some believe, is to create a black hole directly from a cloud of gas: a scenario called "direct collapse."

It starts with gas clouds made of hydrogen, helium and other elements, the same raw materials from which stars are born.

EILAT GLIKMAN: The denser clouds will start to collapse under their own gravity. And as they collapse, parts that are more dense will collapse more quickly. And so, what happens is the cloud fragments.

JANNA LEVIN: Those fragments continue collapsing until the hydrogen atoms within them begin to merge, nuclear fusion begins and stars are created.

But what if a giant gas cloud collapsed without making stars?

PRIYAMVADA NATARAJAN: We realized that there are a set of physical conditions that would allow you to form a very large gas disk prior to the formation of any stars. So, this gas disk starts getting unstable, that would allow the mass to sort of flow into the center very, very rapidly, and make a very massive black hole.

 

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[lexluthermiester]

it'll never know this place.

Not true. While we can not directly observe such an object, we can work out what happens inside of one. We only need to put the pieces of that puzzle together. We'll get there..

 

[Drone]

Fun stuff:

 

[Dinnercore]

Can I spread some love for neutron-stars here too? The close-but-not-quite black holes.

What fascinated me about them is the fact that they are already so dense and have such a strong gravitational pull that they heavily deform the path of light, but light can still escape from them. This means if you were looking at one, you could see more then 50% of its surface:

 

[lexluthermiester]

Kesden worked with Shravan Hanasoge, from Princeton University and the Max Planck Institute for Solar System Research, to work out method of using solar oscillations to determine whether a small, primordial black hole passed through a star. If the data can show that these small black holes formed near the beginning of the universe do exist, they might make good candidates for dark matter.

That is a very interesting theory.

 

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[FCG]

Black holes do not exist.
White dwarf stars, a product of Type II supernova, are confused for these made up stellar objects.
Due to motion in the ultra high-speed range, white dwarf stars exhibit anti-gravity "forces."
Only once the ultra high-speed motion of the constituent atoms is sufficiently abated does the white dwarf become visible.

 

[AmioriK]

Black holes do not exist.
White dwarf stars, a product of Type II supernova, are confused for these made up stellar objects.
Due to motion in the ultra high-speed range, white dwarf stars would exhibit anti-gravity "forces."

What's at the centre of most large galaxies, then?

 

[FCG]

What's at the centre of most large galaxies, then?

Depends on if your definition of galaxy fits alternative definitions of a galaxy, one in particular that I'm thinking of...

That being said, at the center of most galaxies depends on the period in the evolutionary life cycle... could be multiple proto-stars still working their way to Red Giant globulars/stars in preparation for entrance into Main Sequence... could be an array of white dwarf remnants (exhibiting anti-gravity)... or a combination of the two including stars anywhere in the Main Sequence.

I'll show this again: