Blackholes

xena · Posted: Fri Jun 20, 2008 11:19 am Post subject: Blackholes

Has it been decided yet about black holes? I just watched a documentary which has confused me even more. One minute it says that blackholes destroy everything around them, the next it says they are the reason for the creation of life and then it says, andromeda and the milkyway could clash at at anytime and destroy life as we know it. I'm not too good on concentrating. Have they come to a conclusion yet or is it still not known?
New to this science stuff.
Anyone got any links I could read or watch?

kmisho · Posted: Fri Jun 20, 2008 11:29 am Post subject: Re: Blackholes

Dawkadoodle · Posted: Fri Jun 20, 2008 11:29 am Post subject: Re: Blackholes

aileron · Posted: Fri Jun 20, 2008 11:33 am Post subject:

The latest theory is that supermassive black holes are involved in the formation of galaxies. It is unclear whether stars can form outside of galaxies, so without galaxies life as we know it perhaps would be improbable. As I understand it, it is as yet a matter of conjecture whether the supermassive black hole forms as a part of the galaxy formation, the galaxy forms around a supermassive black hole, or some other dynamic. What is fairly certain is that every large galaxy checked for one has a supermassive black hole near the center of mass of the galaxy.

xena · Posted: Fri Jun 20, 2008 11:38 am Post subject:

Thanks for your input.
I'll see if I can find someone who may have put Steven Hawkings book on the net.
I found 'The God delusion' for free Laughing

Dawkadoodle · Posted: Fri Jun 20, 2008 11:44 am Post subject:

xena · Posted: Fri Jun 20, 2008 11:46 am Post subject:

I'm fast

http://www.scribd.com/doc/3324805/Stephen-Hawking-A-Brief-History-Of-Time

Hugga_Bear · Posted: Sat Jun 21, 2008 11:17 am Post subject:

supermassive black holes sound scary, the size of plutos orbit : / i mean thats just...insane...
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Raskolnikov · Posted: Sat Jun 21, 2008 2:45 pm Post subject: Re: Blackholes

Hugga_Bear · Posted: Sat Jun 21, 2008 3:09 pm Post subject:

they could indeed, under that much pressure it is hard to speculate as to what would happen...

of course you could try and test it.

Just dont expect your results to ever be seen...

I guess it will take a lot of advancements to even begin to understand black holes...
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Unbeliever · Posted: Sat Jun 21, 2008 3:24 pm Post subject:

I don't see how black holes could have time form singularities, given general relativity. As the surface of the collapsing star falls toward the event horizon, time, as seen from a distant reference frame, would appear to slow down the collapse, and eventually stop it at the event horizon, so that we'd never have time to see the stellar surface fall below the Schwartzchild radius. So it seems to me that there hasn't been enough time since the origin of the universe for any singularities to form from stellar collapse.

Am I missing something?
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Dawkadoodle · Posted: Sat Jun 21, 2008 3:52 pm Post subject: Re: Blackholes

Shiranu · Posted: Sat Jun 21, 2008 4:13 pm Post subject:

I read somewhere that all off the matter absorbed by black holes are supose to be massing in...some other place? lol...in a super-super-super-super-super-super tiny ball of matter, so its not actually destroyed, but at the very heart of a black hole. Where this heart is...*Shrug* . But yeah, basically everything becomes one inside a black hole...

...although, if you would want to be come one with it, you would be dead, more than likely... still, becoming one with planets, stars, dark matter, etc. etc.? AWSSSSOME Very Happy

.

Edit - Although, in a sense, we already ARE one with nature, in that we, everything around us, this planet, this solar system, etc. all devoloped out of materials found in nebulai and asteroids Very Happy

.
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Edd · Posted: Sun Jun 29, 2008 8:21 pm Post subject: Re: Blackholes

joshuas3521 · Posted: Sun Jun 29, 2008 8:30 pm Post subject:

A black hole causes a singularity. Once something is so massive that light cannot escape, literally nothing can escape. Therefore, within a black hole, time is undefined because predictions cannot be made based on its current state. It's similar to the universe before the big bang.
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