Black holes are cool

by Anonymous 11 years ago

ikr. Resisting urge to make reference to actual temperature...

by Anonymous 11 years ago

STOP RESISTING AND TELL ME ALREADY

by Anonymous 11 years ago

Very well. The tidal forces caused by the immensely strong gravitational field of a singularity cause the atoms in matter to stretch. This, combined with the already hot matter that black holes usually 'eat' create a disk of matter hotter and brighter than a star. In the case of supermassive black holes, the event horizon is far enough away from the singularity for the tidal forces to no spaghettify matter before entry. This would theoretically allow you to fall, alive, into a supermassive black hole. However, the tidal forces in side it, and it's tendency to retain infrared photons (heat) would roast you upon entry. Thus, black holes are actually extremely hot places.

by Anonymous 11 years ago

Damn. The next time I have a physics question, I won't google it, I'll B10ckH34d it.

by Anonymous 11 years ago

:)

by Anonymous 11 years ago

(:

by Anonymous 11 years ago

i'm sorry but seriously no, your physics is all wrong on a basic level. the matter inside a black hole is prevented from moving as it is packed together so tightly by gravity itself. Seeing at temperature is the kenetic energy of each particle E = 1/2mv^2, as they are prevented from moving v = 0, so the energy of that particle is zero. so it is 0k inside a black hole. Jesus Christ, before you post posts about physics make sure your physics is right.

by Anonymous 11 years ago

I don't know //too// much about physics or black holes, but from what I know about thermodynamics and heat energy, what you said makes a lot more sense.

by Anonymous 11 years ago

But that's only at the very centre. Within the hole itself, ie the event horizon, there are particles orbiting the singularity. Also, hot things are not needed to heat up an object, just photons, and the inside if the event horizon is actually pretty bright with all the orbiting photons. If your eye was somehow in there and undamaged, lots of photons would hit your retina. Now how about you get some understanding of the context before you criticize my knowledge of science, hmm?

by Anonymous 11 years ago

You clearly don't understand black hole theory, the mass of a blackhole is in it's centre, not event horizon, the event horizon does not include the photon sphere, the only part of a black hole that could contains photons. The clue is in the name BLACK hole, photons cannot escape it, they too are sucked in and cooled to absolute zero...

by Anonymous 11 years ago

Outside the event horizon, photons' paths are bent. At the event horizon, two things can happen 1. The photon is sucked into the singularity and cooled to absolute zero 2. The photon orbits the singularity at the event horizon. The way you talk, I think you understand black holes, but we're talking about different parts. May posts states that most of the volume is vacuum like space, showing that I do know all the mass is just in the middle. Given that all photons travel at ~300000km/s, at the event horizon, they orbit, while any further in, they spiral toward the centre. At, say, 1 mm past the horizon, their orbit distance shrinks slowly, but goes much faster at, say, 1 km past the horizon. However, until the precise point of impact, the photon and any particles still have their kinetic energy, and maintain a very high temperature right up until contact and fusion with the singularity. I think I know what you're saying. That photons can't stay at a constant distance form the singularity past the event horizon. That is true, but they can still exist, but only for the time it takes to travel the distance between the horizon and singularity.

by Anonymous 11 years ago

no you have it wrong, the resultant temperature of aa black hole is always absolute zero, the process to pull the matter aand photons into the black hole is a hot process but by definition the black hole IS the mass holding centre. The photons have NO MASS thus NO kentic energy, they are energy themselves but they hold no mass so cannot be temperature, and seeing as the only mass for the photons to heat is in the centre at absolute zero they are ineffective, so the temperature is 0 kelvin

by Anonymous 11 years ago

Ah, I see. I'm using the lay man's definition of black hole because I find it easier to say 'singularity' when referring to the massive part and 'black hole' when referring to the entire black part, ie, the part that looks like a hole. So to sum up, the area between the singularity and event horizon is extremely hot, while the singularity itself is extremely cold.

by Anonymous 11 years ago

so in other words, I was right... All you're explaining is that when a mass is accelerated by gravity, it gets more kenetic energy thus heats up... Dont talk science in laymans terms, it doesn't work, leave the science to the big boys

by Anonymous 11 years ago

I used the layman's term to differentiate between the singularity, or actual black hole, and the observed black hole. So any way, you were right, but that doesn't mean I was wrong. We were arguing based on a misunderstanding where you thought I thought the mass is spread through the black hole (layman) despite my post stating the opposite, and my repeated use of singularity when referring to the actual mass. And I think you meant to reply to my comment instead of just comment on the post. In that context, I was referring to the space between the singularity and event horizon. I apologise if that was ambiguous. Also, I'm not completely sure what the space between the event horizon and singularity is scientifically, so if you could tell me, that would be great.

by Anonymous 11 years ago

the space between the horizon is an eventual vacuum, as all the particles that occupy its space are so be consumed by the black hole, so if you looked at the area after a long time then it would a vacuum

by Anonymous 11 years ago