What is Digg?61 Comments
- Grimdotdotdot, on 10/12/2007, -2/+14I hope it's not the same as crossing the streams...
- camintmier, on 10/12/2007, -3/+13Wow. 2 black holes going to crash into each other. That really sucks...
*hopes for someone to get the joke* - inactive, on 10/12/2007, -1/+11Someone enlighten me...how come X-ray can escape black holes when light can't...I thought nothing could escape.
- Phanatic1a, on 10/12/2007, -1/+10The x-rays don't come from the hole itself. They come from infalling matter in the accretion disc, which is very hot. Hot enough to emit x-rays, actually.
- retral, on 10/12/2007, -0/+8Black holes are indeed pretty amazing things when you think about them, but one must remember that this event has either already happened, or will happen (due to lag of light-travel across space, we're just now seeing what's going on what happened x00(0...?) years ago, and also the fact that these things happen over vast periods (thousands/millions/billions of years) of time, the scale is so massive that humans can't necessarily grasp the concept entirely.
- inactive, on 10/12/2007, -0/+4OK...thx Phanatic...appreciated. Also...I found this: http://cosmology.berkeley.edu/Education/BHfaq.html#q10
Quote:
"Now why do black holes evaporate? Here's one way to look at it, which is only moderately inaccurate. (I don't think it's possible to do much better than this, unless you want to spend a few years learning about quantum field theory in curved space.) One of the consequences of the uncertainty principle of quantum mechanics is that it's possible for the law of energy conservation to be violated, but only for very short durations. The Universe is able to produce mass and energy out of nowhere, but only if that mass and energy disappear again very quickly. One particular way in which this strange phenomenon manifests itself goes by the name of vacuum fluctuations. Pairs consisting of a particle and antiparticle can appear out of nowhere, exist for a very short time, and then annihilate each other. Energy conservation is violated when the particles are created, but all of that energy is restored when they annihilate again. As weird as all of this sounds, we have actually confirmed experimentally that these vacuum fluctuations are real.
Now, suppose one of these vacuum fluctuations happens near the horizon of a black hole. It may happen that one of the two particles falls across the horizon, while the other one escapes. The one that escapes carries energy away from the black hole and may be detected by some observer far away. To that observer, it will look like the black hole has just emitted a particle. This process happens repeatedly, and the observer sees a continuous stream of radiation from the black hole." - inactive, on 10/12/2007, -0/+4From the article "The Milky Way's own supermassive black hole has swallowed as much material as four million suns..."
Bzzt. Stars don't swallow matter. Unless they're Paris Hilton ;)
I understand what they meant "...swallowed enough matter to equal the mass of four million suns" but, still, get it right. - VegaObscura3, on 10/12/2007, -0/+3I think he is talking about before the earth. Difficult to grasp, yes.
- RobotCitizen, on 10/12/2007, -5/+8X-Rays come from the accelerating gases just outside the event horizon.
Also, Bruce Lee > Jack Bauer > MacGuyver > Chuck Norris - WaterDragon, on 10/12/2007, -2/+4They appear so far away, that they in fact already collided....millions of years ago, and swallowed up the entire universe. None of this exists anymore!
- dhcmrlchtdj, on 10/12/2007, -0/+2the universe might end in a vacuum metastability disaster before black holes swallow everything... scary. http://en.wikipedia.org/wiki/Vacuum_metastability_disaster
- aliljet, on 10/12/2007, -0/+2Wahoo Wah! This is a pretty amazing story -- if only time moved a bit more quickly (or I moved a bit more quickly), I could actaully read about how this kind of thing ends ..
Oh well, cool stuff though. - carpespasm, on 10/12/2007, -0/+2actually, if they are any good distance away, then the collision probably already occoured many years ago, we're just now seeing it. hmm, wonder if you could model their movement afterword to figure out where they actually are no$OIUF*(WU)(#CJM)I(${}#ATH0
NO CARRIER - RavenLemon, on 10/12/2007, -0/+2What Nullo meant, in his 2 big paragraphs that are so complicated, is that new theories actually say that black holes emit radiation and "things" can actually come out of them. Its kind of complicated and I wont go over the details, but over time black holes evaporate and they will eventually vanish by losing that energy.
- mikebot, on 10/12/2007, -0/+2You do know that black holes don't actually go anywhere, right? It just gets crushed and added to the incredibly dense mass at the centre.
- Xopl, on 10/12/2007, -1/+3I thought we proved that Black Holes didn't exist... I mean, it was on digg.
- DinkyDink, on 10/12/2007, -0/+1Resonance cascade scenario?
Where is Gordon Freeman!? - Sithseth, on 10/12/2007, -1/+2Let me help your mortal minds.
1.) A black whole isn't a "super object" in space, it still has to follow the laws of physics. A black hole contains the same amount of matter as before it turned into a black hole. Let's say our sun turned into a black hole (all of a sudden), we wouldn't simply be "sucked in", we would still orbit the sun just like every other day, we just would see a dark, dark, really dark, spot in the sky instead of a sun.
2.)The universe has a void, why? Just because, it's there, because it isn't there. Generally, when you come to a paradox like that, you should just accept it. Now, include some Einstein with that, and you'll see that time only exists near matter. So, the farther away you leave "our space", the less of reality there is, cause there's less matter the farther you go out.
Yep, how bout that... And the odds are, no on will read this any who...being its not on the bottom of the page... - carpespasm, on 10/12/2007, -0/+1maybe it's like getting your shwartz tangled?
- forger, on 10/12/2007, -0/+1Hm.. Logically when black holes collide, they "eat" each other (?) I'm not sure, just guessing!
- inactive, on 10/12/2007, -7/+8Oh noes!
- stoops, on 10/12/2007, -0/+1I know man, sometimes I wonder the exact same things like is space infinately large? If so, are there infinite amount of things to fill it or does it all just become dark after a certain part. If not, is there an end and if so what's at the end? Why haven't aliens shown us the way yet, huh??? Is earth an alien experiment waiting to see how long it takes us to figure out that there is an experiment about us???
- OropheR, on 10/12/2007, -0/+1Im just glad they dont come this way....
- Kinsbane, on 10/12/2007, -0/+1Did anyone else think of Geometry Wars when they read the title?
what if they collide, explode, and send neon-blue-glowing discs out to try and destroy our spaceship?! - DtectiveGFriday, on 10/12/2007, -0/+1fun.
- basselope, on 10/12/2007, -0/+1This article may help clear up some of the confusion.
http://www.space.com/scienceastronomy/050823_black_hole.html
It also links to a nice little 6.5mb .mov of the Gamma burst.
http://www.nasa.gov/mov/125497main_DoubleBurstFINAL.mov - sark666, on 10/12/2007, -0/+1Always found it weird that it's talked about as if it's about to happen, when we are just receiving the light imagery now when it probably happened a few million years ago.
- shness, on 10/12/2007, -0/+1Sorry buddy, but the consensus among high energy physicists and people in GR is that black holes do in fact exist. Just because one guys says they don't doesn't mean he is right. Don't believe everything you read, especially the stuff you get on DIgg ... unless it is a blog about religion or some other *****.
- danpsmith, on 10/12/2007, -0/+1"are likely to merge"
Umm...considering they are talking about in the distant universe, and this is "about" to happen, and the fact that light takes time to travel, couldn't this have already happened? - Lutz, on 10/12/2007, -0/+1eh... go to www.startrek.com and educate your self...
- skaughtm, on 10/12/2007, -0/+1is it just me or is digg now like slashdot but 3 times faster?
- nighthwk1, on 10/12/2007, -0/+1They aren't fixed "holes in space", they are more like dense stars that don't emit light. So, it would continue the movement it had before it became a black hole, plus any momentum from the objects it sucks in (which probably has a very small effect).
- kurtu5, on 10/12/2007, -0/+1onlyfeeds.com again? comeon georgeb. Quit trying to fake out google page rank by using digg.
by georgeb on 4/05/06
[below viewing threshold, hide comment] - 23 diggs
How about ignoring the link all together and just looking at my post?? Seems you forgot to mention that every single post I've made actually CONTRIBUTES to teh discussion, unlike yours just didn't.
It's not like I said 2 words then posted a link. I made a completely relevant comment. Get off your high horse. No one gives a ***** whether you visit the link or not. That link was for the search engines.
I swear sometimes people confuse spam paranoia with their own self importance issues.
by Acidosis on 4/05/06
8 diggs
So you think its okay to use Digg to trick search engines into thinking anyone likes your website? - mckinnej, on 10/12/2007, -0/+1Must...Resist...Bad...Joke...Impulse.......Nooooo, I can't hold back...
Oh great, now we're going to get into the whole "my blackhole is bigger than yours" thing with the aliens. :) - kickarse, on 10/12/2007, -0/+1I think they both suck
*looks both ways and runs* - inactive, on 10/12/2007, -0/+1dhcmrlchtdj,
I believe we may be able to apply this vacuum metastability theory to explain how the massive "dot com bubble" burst, and eventually sucked so many jobs and capital expenditures into the false vacuum that exists in the heads of corrupt wall street analysts. - inactive, on 10/12/2007, -9/+9Maybe this is what causes a 'Big Bang'? Be afraid. be VERY afraid. Unless of course you believe that a magic man in the sky will save everyone. :)
- nihilozero, on 10/12/2007, -0/+0Glad there are people spending time and money on this imminent disaster -- now maybe we'll be able to prevent it and similiar crises. No diggs.
- inactive, on 10/12/2007, -1/+1[quote]Black holes are among the oldest regions of the universe and hold clues to understanding the formation of the universe and its destiny.[/quote]
I think black holes ARE how the universe was formed. They suck everything in and that's why there is so much empty space in.... well space. I guess the end game is when they finally suck in everything.
I just got a headache thinking about the universe itself. Where is the universe? Is it inside of something? As we all sit here on digg going about our lives there's a big universe out there with things going on but is the universe really infinite? What's going on outside of the universe? Too bad there will never be a technology that allows us to move fast enough to travel the (unknown) amount of light years it would take to reach the end of the universe. Only way we can ever find out is with worm holes I guess.
@tragick - good question. if black holes don't move how the hell are they gonna "collide"? Could it be their mass is growing and the edges will collide? Then their own pull will pull them together.... I guess... :(
- George
http://www.onlyfeeds.com - CyberNigma, on 10/12/2007, -4/+4> Unless of course you believe that a magic man in the sky will save everyone. :)
in which case you may still be wrong and will end up with the same fate anyways, but at least you will not be afraid near the end. of course there is the ego to consider, that it may be better to be afraid and right than not afraid and ignorant (though nobody will know in the end whether you're right or not). :-)
in other words, who cares... an -digg for bringing in a religious discussion into a science/tech forum. - jeremy66158, on 10/12/2007, -2/+2Maybe they have merged and the light/x-rays haven't arrived yet?
- tragik, on 10/12/2007, -0/+0My only problem with the uber super duper big bad black holes is that i can't quite see how they move.
From my (admittedly limited) astronomy knowledge, i seem to recall that a black hole doesn't actually go anywhere, just sits there, and uses the movement of galaxies and its own increasing gravity to suck stuff in. If the holes themselves moved, I'm sure they would have anihilated half of the universe by now...
Also, if these two holes were to somehow move towards each other, woudlnt there be a high risk for an collision > explosion? - cantankerous, on 10/12/2007, -1/+1I'm really curious as to where all that planetary and star stuff goes when a black hole takes it all in. I hope they find out someday.. as long as it's not our planet that gets sucked in for the study.
- DragonChaser, on 10/12/2007, -0/+0black holes dont exist....there was once on digg an article that they dont exist and are just death stars.
its more correct then believing in black holes.
Cause the theory thats its an dead star and not an hole sucking up everything doesnt double cross the laws of nature.(it atracts stuff but doenst suck up)
http://www.newscientist.com/article.ns?id=mg18925423.600&feedId=online-news_rss20
if u gonna give me a thumb down read the link first, for those that dont know what i am talking about. - Petronski, on 10/12/2007, -1/+1Is this another DVD promotion for "Brokeback Mountain?"
- Radiohead84, on 10/12/2007, -0/+0Interesting. But isnt it so far away that by the time we see it, it has already happend? I know the speed of light and blah blah blah, but thats damn far away.
- Sithseth, on 10/12/2007, -1/+1It's all relative. To us, it hasn't happened yet, so let's accept that it hasn't happened. It would make life so much easier to live if people could just grasp that idea...
- Petronski, on 10/12/2007, -1/+1Important safety tip...
- Cerebral, on 10/12/2007, -3/+1ahh post messed up
- blackb0x, on 10/12/2007, -4/+2I'm glad humans are too small minded to be able to grasp the concept of time.
(yeah, thick sarcasm) -
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