Astronomers have found up to 35 black holes in Andromeda galaxy - Polidicks

[QUOTE=DeEz;41245990]would this also apply to the gravitational force that surrounding objects are affected by would it be reversed?[/QUOTE] I'm not sure. I don't think so, though I can't find any explicit discussion of the gravity in the region outside a white hole in my GR textbook. Wikipedia says it still attracts stuff.

according to wikipedia, apparently no an object falling toward the white hole would never actually reach the event horizon how does that make sense johnny help

[QUOTE=BananaFoam;41245841]Am I right in saying black holes are basically negative reality, at least to an extent?[/QUOTE] Not really, no.

damnit automerge

[QUOTE=DeEz;41246069]according to wikipedia, apparently no an object falling toward the white hole would never actually reach the event horizon how does that make sense johnny help[/QUOTE] ¯\_(ツ)_/¯

oh my god again [QUOTE=JohnnyMo1;41246075]¯\_(ツ)_/¯[/QUOTE] why do you insist on destroying my automerge time and time again

[QUOTE=Emperor Scorpious II;41245935]Basically an exit where as a black hole is an entrance, so to speak?[/QUOTE] Sort of. It bears mentioning that in the maximally extended Schwarzschild solution, where the idea of white holes originally came from, you can't really go through them. The best that you could hope for is sending a light beam along the edge of the horizon of the black hole to end up on the horizon of the while hole, never really escaping it. But realistically, even that would break the symmetry and your white hole disappears. [editline]29th June 2013[/editline] [QUOTE=DeEz;41246076]why do you insist on destroying my automerge time and time again[/QUOTE] ¯\_(ツ)_/¯

[QUOTE=JohnnyMo1;41246096] ¯\_(ツ)_/¯[/QUOTE] ¯\_( ͡° ͜ʖ ͡°)_/¯

[QUOTE=JohnnyMo1;41246096]Sort of. It bears mentioning that in the maximally extended Schwarzschild solution, where the idea of white holes originally came from, you can't really go through them. The best that you could hope for is sending a light beam along the edge of the horizon of the black hole to end up on the horizon of the while hole, never really escaping it. But realistically, even that would break the symmetry and your white hole disappears.[/QUOTE] Does black hole + white hole = wormhole?

[QUOTE=JohnnyMo1;41245763]It looks like a time-reversed black hole, i.e. stuff can come out of the event horizon but nothing can reach the event horizon from the outside.[/QUOTE] why is it just a mathy thing that someone came up with that has no basis in nature or can it technically happen somehow

[QUOTE=Zeke129;41246269]why is it just a mathy thing that someone came up with that has no basis in nature or can it technically happen somehow[/QUOTE] They basically said, "hey, this spacetime has edges. We don't want it to have edges. Let's extend it as far as it can naturally go," and you end up with the white hole and an "alternate universe" region that looks like what's outside the black hole.

[QUOTE=JohnnyMo1;41246332]They basically said, "hey, this spacetime has edges. We don't want it to have edges. Let's extend it as far as it can naturally go," and you end up with the white hole and an "alternate universe" region that looks like what's outside the black hole.[/QUOTE] so its physicists trying to oppress us again

[QUOTE=Zeke129;41246356]so its physicists trying to oppress us again[/QUOTE] yes we are devious schemers

Do black holes even need to have an other side? Can't they just keep grabbing matter and increasing their gravitational range? All the "stuff" is just compacted into one point. It doesn't need to go anywhere. Like a deep pointy cosmic gravity belly button. So two black holes joining would make 1 black hole with the whole mass.

[QUOTE=JohnnyMo1;41246595]yes we are devious schemers[/QUOTE] i dont believe in protons

I just thought about something. What if, instead of the centers of spiral galaxies like ours being supermassive black holes like some people think, they're actually white holes spewing forth new matter in an endless spiral pattern? I mean, think about it, the centers of spiral-shaped galaxies like the Milky Way are [URL="https://www.google.com/search?q=galaxy&rlz=1C1CHFX_enUS454US454&source=lnms&tbm=isch&sa=X&ei=ScPPUbPKNozG9gTV7oGABQ&ved=0CAkQ_AUoAQ&biw=1366&bih=653#rlz=1C1CHFX_enUS454US454&tbm=isch&sa=1&q=spiral+galaxy&oq=spiral+galaxy&gs_l=img.3..0l10.10675.12010.0.12376.7.7.0.0.0.0.87.415.7.7.0...0.0.0..1c.1.17.img.5LDZvXiv5v0&bav=on.2,or.r_qf.&bvm=bv.48572450,d.eWU&fp=1d95e5c3e84ae4e4&biw=1366&bih=653"]seriously fucking bright[/URL], which would make sense if they were spewing endless streams of (possibly white-hot) new matter. Mind you, I know fuck-all about the science behind such things, but it'd certainly explain where the white holes are hiding and where all that consumed matter from black holes goes. Under this assumption, if a galaxy's black holes connect to its central white hole (unlikely, but bear with me), they'd be the horrifying, physics-raping, galactic-scale equivalent of those damn "return to start" squares in every board game ever.

[QUOTE=TurboSax;41247474]I just thought about something. What if, instead of the centers of spiral galaxies like ours being supermassive black holes like some people think, they're actually white holes spewing forth new matter in an endless spiral pattern? I mean, think about it, the centers of spiral-shaped galaxies like the Milky Way are [URL="https://www.google.com/search?q=galaxy&rlz=1C1CHFX_enUS454US454&source=lnms&tbm=isch&sa=X&ei=ScPPUbPKNozG9gTV7oGABQ&ved=0CAkQ_AUoAQ&biw=1366&bih=653#rlz=1C1CHFX_enUS454US454&tbm=isch&sa=1&q=spiral+galaxy&oq=spiral+galaxy&gs_l=img.3..0l10.10675.12010.0.12376.7.7.0.0.0.0.87.415.7.7.0...0.0.0..1c.1.17.img.5LDZvXiv5v0&bav=on.2,or.r_qf.&bvm=bv.48572450,d.eWU&fp=1d95e5c3e84ae4e4&biw=1366&bih=653"]seriously fucking bright[/URL], which would make sense if they were spewing endless streams of (possibly white-hot) new matter. Mind you, I know fuck-all about the science behind such things, but it'd certainly explain where the white holes are hiding and where all that consumed matter from black holes goes. Under this assumption, if a galaxy's black holes connect to its central white hole (unlikely, but bear with me), they'd be the horrifying, physics-raping, galactic-scale equivalent of those damn "return to start" squares in every board game ever.[/QUOTE] I'm pretty sure if there were galaxies with a white hole at the centre we would have noticed them growing quite rapidly by now.

[QUOTE=bravehat;41247533]I'm pretty sure if there were galaxies with a white hole at the centre we would have noticed them growing quite rapidly by now.[/QUOTE] Yeah, like I said, I know precisely jack-shit about the science behind all this. I'm basically a hick with a computer who's fascinated by all the "purty" lights in space.

[QUOTE=TurboSax;41247563]Yeah, like I said, I know precisely jack-shit about the science behind all this. I'm basically a hick with a computer who's fascinated by all the "purty" lights in space.[/QUOTE] No worse than the most of us.. I just like to think about space until the chills running through my conciousness and down my spine become too much to handle. I think it is a good way of grounding oneself in reality to attempt to comprehend all of that which is bigger and more mysterious than they could even imagine.

[QUOTE=JohnnyMo1;41244288]Terms like "cosmic vacuum cleaners" that always get applied to black holes are so misleading. Like that that Doctor Who episode where David Tennant is like "WE CAN'T POSSIBLY BE ORBITING A BLACK HOLE, THEY SUCK EVERYTHING UP!" [editline]29th June 2013[/editline] Black holes are pretty much the most interesting thing in space.[/QUOTE] Lies Life is. It's so crazy it makes my head explode.

This confirms the existence of another alien civilization in space. This also confirms that they tried to build a bigger particle accelerator than ours.

[QUOTE=FreakyMe;41247899]No worse than the most of us.. I just like to think about space until the chills running through my conciousness and down my spine become too much to handle. I think it is a good way of grounding oneself in reality to attempt to comprehend all of that which is bigger and more mysterious than they could even imagine.[/QUOTE] It's somewhat depressing that it's such a massive universe out there, and that we're such tiny living specks on a single planet orbiting a single star in a single galaxy, unable to ever truly see and comprehend it all. It's also saddening to think about how, thanks to our own petty bickering, we possibly may never leave the proverbial cradle, and step forward unto the vast stars as we wish we could now. And yet, we're also more powerful and important than all of that, as organic, thinking life in what appears (in our limited vision) to be a dead universe of rock and stardust. As fish who not only have learned to rule over and control the pond they were born in and likely will finally die in, but also to see out of the water and into the vast, inhospitable, and beautiful existence that lies so impossibly far outside their reach and yet so painfully close. Sorry, I apparently get all poetic and such when tired.

[QUOTE=Sir M;41245328]What if all the black holes slowly pull eachother together into one super black hole which pulls in the universe, accelerating as it pulls more in, until eventually the entire universe is the size of a pinhead. and it then gets so closely compacted that the force pushing the atoms apart from eachother is greater than the gravity of it all and big bang #n+1[/QUOTE] [url]http://en.wikipedia.org/wiki/Big_crunch[/url] Already a theory bro. Although, from what I understand, Heat Death is a much more likely scenario given our current understanding of the universe. [editline]30th June 2013[/editline] [url]http://en.wikipedia.org/wiki/Heat_death_of_the_universe[/url] Fuck off entropy

While we're on the topic of doomsday scenarios; This would suck so much: [url]http://en.wikipedia.org/wiki/False_vacuum[/url]

[QUOTE=JohnnyMo1;41244288] Black holes are pretty much the most interesting thing in space.[/QUOTE] I think people are the most interesting thing in space.

If white holes are (theoretically) the "exit" of a black hole, wouldn't that mean that the center of a white hole has less mass than the rest of space itself, in that, light is being pulled out of the hole because gravity is infinitely stronger away from the center, so much that mass can no longer be held together and bonds literally expand in every direction to infinity? I don't understand shit

[QUOTE=ZakkShock;41244148]these both terrify and interest me to no end.[/QUOTE] I got so much relief when I realised that black holes are tame unless youstart brushing up aagainst their event horizon

[QUOTE=Noth;41246242]Does black hole + white hole = wormhole?[/QUOTE] No, gray hole.

[QUOTE=DeEz;41246069]according to wikipedia, apparently no an object falling toward the white hole would never actually reach the event horizon how does that make sense johnny help[/QUOTE] Basically, the same point of which a black hole of the same size as the white one, The event horizon does not exist. This is due to the fact you can't enter a white hole. It's sort of like a star that spits out gravitational fields, as well as matter from within it's depths. It would be impossible to actually enter it, because there is no escape velocity, but the exit velocity is at or near the speed of light

[QUOTE=The Worm;41246611]Do black holes even need to have an other side? Can't they just keep grabbing matter and increasing their gravitational range? All the "stuff" is just compacted into one point. It doesn't need to go anywhere. Like a deep pointy cosmic gravity belly button. So two black holes joining would make 1 black hole with the whole mass.[/QUOTE] No, they don't really need an exit. Like I said before, white holes are probably pretty unphysical anyway. They only arise under very, very nice conditions.