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164 Comments
- kvgirard, on 04/19/2009, -4/+254i figured it would look more like this
http://tinyurl.com/amvnrh - killdashnine, on 04/19/2009, -1/+105If you can see this, you've gone too far! (Thanks, Event Horizon).
- DirtPile, on 04/19/2009, -4/+90Why do all the holes have to be black?! Space is racist.
- x70x, on 04/19/2009, -5/+87Damn space... YOU SCARY!
- dicer999, on 04/19/2009, -6/+71***** UNIVERSE - YOU SCARY!
- jasonbalmforth, on 04/19/2009, -3/+52Conservation of Angular Momentum is the answer. For the gas to fall into the black hole it must first lose angular momentum which is transfered to gas in outer regions of the gravitational well, and thus over time a body of gas swirling around the center is formed, called an accretion disk.
- Sublex, on 04/19/2009, -4/+52*****, the universe is terrifying.
- 1ncu3us, on 04/19/2009, -4/+44Any one else REALLY happy that he didn't link to goatse? I probably shouldn't have even mentioned it, lest it be spread further..
- voyetra8, on 04/19/2009, -3/+41Please be gentle on me:
Can someone explain to me why black holes are always represented as a flat spinning disk, or funnel?
I would think that because of its massive density and size, gravity would be equal on all sides.
Wouldn't this result in something more like a sphere collapsing on itself, versus these visualizations that always seem to show a flat plane of spinning matter? - nerice6, on 04/19/2009, -2/+37http://www.dramabutton.com/
- Fuzzycop, on 04/19/2009, -1/+34Why are all the comments on Digg usually immature and uninformed?
- jasonbalmforth, on 04/19/2009, -2/+31The same process explains why all the planets in our solar system orbit in a narrow plane around the sun (the plane of the ecliptic) and not at a whole host of arbitrary orbital inclinations. In the early development of our solar system the matter orbiting the sun was pulled into an accretion disk in the same manner as above.
- dhughes, on 04/19/2009, -2/+25 Uranus is blue.
- inactive, on 04/19/2009, -3/+23space is black, it can call whatever it wants black and it's ok
- tidu, on 04/19/2009, -0/+17Go back to school, badfish.
- inactive, on 04/19/2009, -6/+22i think you mean white hole.
http://www.youtube.com/watch?v=h-akk3gog34 - Danby123, on 04/19/2009, -2/+18I'm an atheist, but I still buried you for being irrelevant.
- dazparkour, on 04/19/2009, -0/+16Lots of digg comments are quite informed.
Source: jasonbalmforth
Conservation of Angular Momentum is the answer. For the gas to fall into the black hole it must first lose angular momentum which is transfered to gas in outer regions of the gravitational well, and thus over time a body of gas swirling around the center is formed, called an accretion disk. - Whatasillyhat, on 04/19/2009, -2/+17What an idiot.
- wontstoptalking, on 04/19/2009, -2/+16That's a much better artist's rendition- you could sell that to NASA for millions. It could probably be the photo of the month- "Black hole doing what black holes do!"
- KMartSheriff, on 04/19/2009, -0/+14@badfish0116
Please provide evidence to prove him wrong. - random90210, on 04/19/2009, -1/+14Never seen that one before. thanks.
- jasonbalmforth, on 04/19/2009, -0/+13@badfish0116
The evidence supporting the Conservation of Angular Momentum in physical systems is all around you, for an example you might find a little hard to refute see my comment below. - SmackAttack42, on 04/19/2009, -2/+15My anus looks like that black hole after mexican chili dog night
- Disgod, on 04/19/2009, -2/+13Depends how big the Black Hole is. A small one, and you're toast, a super massive black hole and you could practically waltz right up to the event horizon without much of a problem.
- jasonbalmforth, on 04/19/2009, -3/+13Physics Fail.
- mysmartypants, on 04/19/2009, -2/+12You sound very much the same way that proponents of pure Newtonian physics did when they heard Einstein put forth his theory of relativity.
- Disgod, on 04/19/2009, -0/+9I sorta expected it, most people hear Black Hole and think instant death and being torn apart if you get near one. They haven't done the research to find out that there are different varieties of black holes or the effects of tidal forces. It is counter intuitive for most people to hear that a bigger black hole is actually less dangerous to get near than a small black hole.
The other really cool, but REALLY counter intuitive fact about black holes is that the largest Black Holes have the same density as air!! Thanks to the BA. - Disgod, on 04/19/2009, -0/+9The reason why a larger black hole won't spaghettify you until much closer to the black hole than a smaller black hole is not because of the amount of gravity you feel, but because the variability of gravity you feel between your feet and your head.
If you're in free fall so gravity doesn't really affect you, you just feel weightless. Spaghettification happens because the gravity at your feet becomes much higher than the gravity at your head, literally pulling you apart. With stellar mass black holes gravity increases very rapidly the closer you get to the event horizon, which means the gravity at your feet will become much higher than at your head leading to spaghettification While a super massive black hole's gravity increases at a much slower rate, because it is spread over a larger area. The gravity at your feet never increases rapidly enough for you to be pulled apart, until you get really close to the event horizon. .
Shamelessly stolen from Wikipedia:
* The average density of a supermassive black hole (measured as the mass of the black hole divided by its Schwarzschild volume) can be very low, and may actually be lower than the density of air. This is because the Schwarzschild radius is directly proportional to mass, while density is inversely proportional to the volume. Since the volume of a spherical object (such as the event horizon of a non-rotating black hole) is directly proportional to the cube of the radius, and mass merely increases linearly, the volume increases at a greater rate than mass. Thus, average density decreases for increasingly larger radii of black holes.
* The tidal forces in the vicinity of the event horizon are significantly weaker. Since the central singularity is so far away from the horizon, a hypothetical astronaut travelling towards the black hole center would not experience significant tidal force until very deep into the black hole.
And here's some cool stuff from the Bad Astronomer including the less dense than air factoid #10:
http://blogs.discovermagazine.com/badastronomy/200 ... - sluggoo, on 04/19/2009, -0/+9Interestingly enough, black holes rotate in the opposite direction on the other side of the universe.
- jasonbalmforth, on 04/19/2009, -0/+8No idea why you're being dugg down Disgod, you're absolutely correct.
- hfactor, on 04/19/2009, -1/+9Thanks for sharing what you "somehow think" about science.
- rlpatton, on 04/19/2009, -1/+8Jets of gas are normal and observable for most black holes. They are due to distortions in magnetic fields surrounding the accretion disk of matter falling inwards. The magnetic distortions shoot jets of gas away from the blackhole (the jets are almost always perpendicular to the accretion disk).
The reason why it seems impossible to people, is because they have a misconception of what the event horizon is, more specifically how big it is. The accretion disk of matter can be light years in diameter, and the jets shooting out can be far way from the actual blackhole singularity and its event horizon (which is extremely smaller in comparison to the observable field of matter swirling around the black hole). - Magi1687, on 04/19/2009, -0/+7I'm not really sure why Disgod is being buried because he has a point. Only if the light being emitted is past the event horizon will you not see it. If the artist's rendition is of gas orbiting near the event horizon then the light would be perfectly visible. Maybe red shifted a bit, but still visible or detectable.
- TheMagician2007, on 04/19/2009, -2/+8Read #3: http://blogs.discovermagazine.com/badastronomy/200 ...
- alienSkull, on 04/19/2009, -0/+6you're a gay fish.
- osteor10, on 04/19/2009, -3/+9wheres the hole?
- btschul, on 04/19/2009, -2/+7I used to play bass for "Less than a Noodle".
- kdmkdmkdm, on 04/20/2009, -0/+5THAT BLACK HOLE COME BY MY HOUSE I KILL IT
- inactive, on 04/19/2009, -0/+5No, that's Doom 4.
- Disgod, on 04/19/2009, -3/+8... I'd like to introduce you to this wonderful theory, you may have heard of it. It's called the THEORY OF RELATIVITY. No matter what the speed of light remains constant to the observer, so as they fall in, if there's light to be seen, then they will see it. The light isn't pulled instantly away from your eyes. Only once it crosses the event horizon do you stop seeing the light around the black hole.
- JesusConrad, on 04/19/2009, -3/+8The Guy in this video is, without a doubt, one of the biggest tools i have ever seen. I'd like to point out now that, just because a guy a has a camera and a youtube account does make anything he says more credible.
- dicer999, on 04/19/2009, -2/+7No, it's a really bad TV show.
- dawnraid101, on 04/20/2009, -0/+5no they took a photo of it...
- hdadeathly, on 04/20/2009, -0/+5How does that guy who drew it know what it looks like?
NASA knows something we don't.... - dazparkour, on 04/19/2009, -0/+5No argument there - there is a lot of trolling, but it normally get's sent down quite quickly anyway.
- grungegbunny, on 04/19/2009, -2/+7We now have evidence of their existence.
- Jeebugorn, on 04/19/2009, -0/+4disgod - please explain. (yes, i am being serious)
- 007isbond1, on 04/19/2009, -3/+7thats what he said..
what? - pendrachken, on 04/19/2009, -1/+5@Khast:
That is precisely why he is asking, your analogy is fallacious in this event; it would normally work for an explanation but for this case the "drain" would need to be located in the center of the water to get the 3D effect of space. He is asking why the hole looks "flat" when you can be viewing it from any angle in a 360 degree radius. -
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