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[Wired] Black Hole Eats Asteroids, Burps Out X-Rays - Page 3

post #21 of 35
Quote:
Originally Posted by headcracker View Post

One thing that always bothered me about black holes is the jets going in both directions as shown in nearly all artists impressions. Wouldn't this mean it sucks matter in from both sides? So, where does the "hole" go? the more you think about this stuff and all the ideas that flow through your head boggle the mind >_>
It doesn't suck matter in from both sides, it EJECTS stuff (or more specifically gamma rays and heat) from it's poles.

This relates back to the basics of black holes, and the first thing to note is that it's not a "hole" in any form or function despite the name. A true "hole" can only exist in 2D space, e.g. poking a hole into a piece of paper or digging a hole in the ground - you still need a flat 2D plane that can make a hole into. But trying to understand/imagine a "hole in 3D space" gave me a headache because it makes no sense whatsoever (atleast to my brain).

A black hole is essentially a single point in 3D space. The important thing is that a black hole behaves just like any spherical object in space - i.e. it has mass, it has polarities caused by the spin (it only spins in one given direction) and it gives the illusion of a sphere because of how matter behaves around it. Stuff orbits around it like Saturn's rings, and stuff that gets too close eventually gets accelerated to near-light speed and dragged towards the center (singularity). I won't say "dragged into the hole" because there is no hole per-se, you simply get dragged towards the singularity. It would be exactly the same as falling down to a planet, except that instead of hitting the surface you would keep falling towards the "core" which has infinite density and zero volume. No I didn't bother imagining that either, moar headches tongue.gif

So humanity said "hurr durr lets just call it a black hole" and everyone was happy with that.

edit: this artist's impression gives a nice concept of what it could look like, that it has a spherical field. Note the "black sphere" isn't the black hole itself, it's just the boundary at which point light can no longer escape the gravity. The singularity itself (the single point in 3D space, the the actual black hole) can never be seen by human eyes because it is permanently hidden by that boundary past which no information or light can make it back. Basically if the laws of physics hold true, we will never EVER know what happens past that boundary no matter how advanced technology gets. It's fun trying to answer that with stuff like wormholes, time travel, warp drives and alternate universes tongue.gif
Interesting stuff eh?

BlackHole-nasa-artist.jpg

edit2: actually in this one I think the artist is trying to show that the ejected material is getting pulled back into the disc and back towards the black hole. But we know for a fact that TON a lot of radiation/heat is fully ejected into space, otherwise we'd never be able to detect black holes tongue.gif
Edited by Tippy - 2/9/12 at 3:08am
post #22 of 35
Quote:
Originally Posted by Tippy View Post

It doesn't suck matter in from both sides, it EJECTS stuff (or more specifically gamma rays and heat) from it's poles.
This relates back to the basics of black holes, and the first thing to note is that it's not a "hole" in any form or function despite the name. A true "hole" can only exist in 2D space, e.g. poking a hole into a piece of paper or digging a hole in the ground - you still need a flat 2D plane that can make a hole into. But trying to understand/imagine a "hole in 3D space" gave me a headache because it makes no sense whatsoever (atleast to my brain).
A black hole is essentially a single point in 3D space. The important thing is that a black hole behaves just like any spherical object in space - i.e. it has mass, it has polarities caused by the spin (it only spins in one given direction) and it gives the illusion of a sphere because of how matter behaves around it. Stuff orbits around it like Saturn's rings, and stuff that gets too close eventually gets accelerated to near-light speed and dragged towards the center (singularity). I won't say "dragged into the hole" because there is no hole per-se, you simply get dragged towards the singularity. It would be exactly the same as falling down to a planet, except that instead of hitting the surface you would keep falling towards the "core" which has infinite density and zero volume. No I didn't bother imagining that either, moar headches tongue.gif
So humanity said "hurr durr lets just call it a black hole" and everyone was happy with that.
edit: this artist's impression gives a nice concept of what it could look like, that it has a spherical field. Note the "black sphere" isn't the black hole itself, it's just the boundary at which point light can no longer escape the gravity. The singularity itself (the single point in 3D space, the the actual black hole) can never be seen by human eyes because it is permanently hidden by that boundary past which no information or light can make it back. Basically if the laws of physics hold true, we will never EVER know what happens past that boundary no matter how advanced technology gets. It's fun trying to answer that with stuff like wormholes, time travel, warp drives and alternate universes tongue.gif
Interesting stuff eh?
BlackHole-nasa-artist.jpg

Interesting is an understatement smile.gif Anything about space really is fascinating to me.

Nice reply, you stopped my head from hurting (just a tiny tiny tiny bit mind lol) Just the other day i was thinking maybe it wasn't a "hole" an thought it might be like a sun (spherical) but "black" (this is just the way i thought of it now, of what it could be) but if it ejects the rays from both poles then "if it was" a hole due to its mass ripping a hole in the fabric of space and time would it still eject from both poles? Alternate universes hmmm maybe but i do beleive there are other universes. I seen an article before where a large part of the universe seems to be been pulled in another direction and what ever is pulling it its gravity must be trully massive like what on earth could pull such a large part of the universe with so many galaxys other than "another universe itself" close to our own one >_>

Really wish the next Einstein would hurry up and tell us what the singularity is tongue.gif

Sorry if i don't make any sence lol not slept for 2 days. Also i was never really good at explaining complicated things. I wanted to reply much longer with some other things that bother me but don't know how to word it in a way that would make sence lol. Heads hurting again now lol >_>
    
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post #23 of 35
Well I'd say the next Einstein is Stephen Hawking, who is very much alive and kicking (relatively speaking). That man has done more research/findings about black holes than anyone else!

I don't know about the whole "ripping a hole in the fabric of space and time" thing since I simply cannot get my brain around a "hole" existing in 3D space. A hole by definition has only 1 way in and out, meanwhile a black hole can suck an object in from any direction due to having a spherical effect with gravity. I just like to imagine it as an infinitely compressed point in space (like a dot), nothing more tongue.gif
post #24 of 35
Tippy I want to say thank you for that awesome explanation on black "holes"! I did not actually think about the whole 2d/3d thing but that totally makes sense. Think of a period at the end of this sentence and imagine it floating in the air in front of you and everythings in the viscinity being sucked "in" to it. Maybe it is not going anywhere but the point in space known as a black hole is getting more and more dense by the second? I dunno just a thought

Sent 4rm my Phone, excuse the grammar...
    
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post #25 of 35
Quote:
Originally Posted by cubanresourceful View Post

Depending on distance and how much light is produced by the eating.
I want to go into a black hole, sounds like loads of fun. smile.gif

No. You would not want to enter a black hole. HAHA! You would become the size of a grain of salt. LOL
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post #26 of 35
rep given to those that quoted me.

I was reading a few weeks ago about some subatomic particles having a mass ~ 0, thus being virtually invisible, can pass right through the black hole's event horizon and not get sucked in.
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post #27 of 35
Quote:
Originally Posted by Grath View Post

I don't think it would be a great idea for us to ever be able to see a "black hole". If we can see it, that probably means it can see us. eek.gif

"...when you gaze long into an abyss the abyss also gazes into you."
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post #28 of 35
Quote:
Originally Posted by BizzareRide View Post

How can anything "burp out" of a black hole. Based on my current understanding, nothing on the electromagnetic spectrum can escape the gravitational pull of a black hole.
..or is there a point-of-no-return.
Someone clarify, please.

It's been noted for quite sometime that things like Xrays, Gamma Rays, and all sorts of output can escape black holes. It's thought, however, that it's simply because the black hole is "voluntarily" spitting this matter out and it's not escaping out of any kind of ability of it's own. It's probably making room for larger particles that can be broken down. Kinda like high school cheer leaders....
post #29 of 35

Black hole eats and farts. That's what I thought by just reading the title.

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post #30 of 35
Quote:
Originally Posted by dstoler View Post

Tippy I want to say thank you for that awesome explanation on black "holes"! I did not actually think about the whole 2d/3d thing but that totally makes sense. Think of a period at the end of this sentence and imagine it floating in the air in front of you and everythings in the viscinity being sucked "in" to it. Maybe it is not going anywhere but the point in space known as a black hole is getting more and more dense by the second? I dunno just a thought
That's exactly how I think of it smile.gif
But it's "density" is not what increases. Density by definition is the amount of mass you can squash into a certain amount of volume, a black hole has already reached infinite density due to having zero volume. This is where math no longer applies because technically if something has zero volume, it should not exist-OH GOD MY HEAD.
Anyway it's mass is what is constantly increasing as more and more stuff falls in.
Edited by Tippy - 2/9/12 at 10:53am
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