white hole / black hole theory

maximus

if a black hole has a singularity, than yes, time would end. but i don't know if falling in a singularity is the same thing as "falling out of the universe".
p.s.: like the new avatar. very creepy. are those actual government photos?

maximus

no, but you're missing the point. there is nothing inside a black hole but gravity.

Labguy

Yes, but what causes the gravity? There must be matter = mass, which is finite and measureable.
That would also seem to rule out the conjecture that the matter / mass flows out somewhere as a "White Hole". If it did, the BH would have no way to increase in mass, as many do. Someone else mentioned that a "singularity" may, or does not need, to exist. For all we know, the event horizon may be the "surface" of the matter of a star that has collapsed to a state more compressed than a neutron star. Neutron stars have a definable surface. Hawking dumped the singularity idea years ago.

Brad_Ad23

To clarify some things: White holes cannot exist. Not only do they violate thermodynamics, but also if there existed any white hole, we'd see it. It would pour out so much radiation that it would be extremely detectable.

Gravity does not escape from a black hole. Remember, gravity is not only a field, but the curvature of spacetime. This curvature of spacetime does not escape from a black hole.

As for Hawking radiation, yes it is information, but it is not yet clear if it is useful information.

maximus

i'm not saying that white holes exist, they don't. exactly because of what you just said. but that arguement doesn't rule out the possibility that they might exist in a more mature universe. before stars, were there beings that wondered if a star could ever be possible?

Brad_Ad23

I wasn't really saying anyone was specifically, just to point out finally why they can't. And chances are, if there were beings before stars...they'd have to be non-corporeal. Since before stars, there were no heavy elements, and the laws of physics would still prohibit white holes then anyways.

Ivan Seeking

Hehe. Thanks. This picture really creeped me out...it looks a little too good. The full sized image is fairly impressive. But no, in spite of the claims otherwise, I have no reason to believe this is a genuine photo.

pss...maximus...it is really a picture of me but don't tell anyone.

Ivan Seeking

Doesn't this depend on how we define our closed system; is it one universe or two?

Egad that was a terrible choice of words. I stand corrected.[:D]

What struck me as interesting was that we can say something about what happens to a mass after it passes the event horizon. Since if a singularity does exist, from our point of view time would stop for any object beyond the EH, then why did the whole debate about black holes being gateways to other universes ever exist? [I don't mean just here but for the last 30 years]. The whole line of reasoning appears to be inconsistent. What good is a gateway through which nothing can really ever pass in the lifetime of the universe?

B_hole-masta

Ok let me get this straight too all of u guys, black holes infinite gravity sources that come frome a star say 100 times more heavier then our own sun,ok? the star goes up in a big bang but instead of realising all the gasses into space it collapses under its own gravity thus creating a black hole, its made of himesphires outer horizon and inner horizon i correct me if im wrong at the center therese infinite gravity.



So it is possible that when it sucked all the matter that got throught the singularity,it might also spit it out ina diffrent space time or what so ever.


of corse even if we do confirm their existance itle be impposible to traver through one.
measuring its starts with a black hole even if it spits you out at a distant point itl probably spit u in shreds, so even if they exist,doesn't matter youl be dead by the time you get to the othr side. :P so good luck in the distant future to some moron that will wan't to go in it (if it exist) :D "happy face"

B_hole-masta

This is what will happen if you enter a black hole: lets say your on your last voyadge into a black hole and you have a clock and your friends have a clock if you notice youl start to see that as you get closer the time starts to slow down withs is caused by the gravity frome the black hole as you get even clser your body will starth to stretch down like spaggeti untill your atoms start to disintergrate"atom by atom youll star falling apart"



even if you manneggged to get out forme a white hole like i said you in small pieces at the size of an atom :P


hope this was at least a litle acurrate (what i know about black hole so far) :)