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just a brief answer :D

and with stars what is the difference between apparent and absoloute magnitude?

2007-11-23 12:00:35 · 12 answers · asked by Jane 1 in Science & Mathematics Astronomy & Space

12 answers

Hi. For the same reason that a black object appears black, no light is emitted. Absolute magnitude is an object's real brightness where apparent magnitude is how it looks from the distance you see it.

2007-11-23 12:31:51 · answer #1 · answered by Cirric 7 · 0 0

Because The Core Of The Black Hole Is Black, It's Invisible Though, Nobody Can See It.

The Outer Layer Of The Black Hole Is Just The Gas Being Sucked In.

2007-11-23 19:48:58 · answer #2 · answered by Christian C 3 · 0 0

Black holes are not black, they are not visible. The name was something given to it by the media I think, so people thought it was black and the name has stuck

Absolute magnitude is the brightness an observed star would have at a standard distance from us of 10 parsecs (about 33 light years). Apparent magnitude is the magnitude of a celestial object directly observed by the eye or instrument like a CCD without any correction for the objects distance

2007-11-23 12:19:08 · answer #3 · answered by Anonymous · 0 1

A black hole is so named because no electromagnetic radiation, including visible light, can escape from it, so it appears as a black hole in the sky.

The apparent magnitude of a celestial object is a measure of its brightness as seen on Earth, but adjusting it to what it would be without our atmosphere.

The absolute magnitude is somewhat more complicated. It is the apparent magnitude an object would have if it were a "standard luminosity distance" away from us. This standard luminosity distance is calculated differently for different things, and I don't completely understand how its done. Basically, they do this so that we can compare the brightness of two different objects without worrying about their distances from us (which would change brightness).

Complicated, I know, but I hope this helps.

2007-11-23 12:25:38 · answer #4 · answered by SVAL 4 · 0 0

Black holes do not exist. There is no evidence that suggests that anything in the universe is separate and above all else. Light is absolutely everywhere in the universe. It's not a 'thing', it's part of everything and it's just an expression of existence itself. So saying that somewhere there is no 'light' is like saying somewhere there is 'nothing'. Since nothing does not exist by definition in the context of... everything, light exists everywhere. It's all gravity, everything is gravity and that's why we have planets and stars. They are the result of existence warping itself, as existence must continue to 'move' and 'bend'.

Black holes, neutron stars and 'nothing' do not exist and are the inventions of quacks who do not have the mental capacity to be honest and truthful. Lots of science 'fields', like quantum physics for example, are new age religions which soul intentions are to control the masses.

Modern astronomy is about as backwards and primitive as you can be. It's based on the illusion of control, as is a black hole.

2007-11-24 10:19:25 · answer #5 · answered by Anonymous · 0 0

because it is black when you look at one, it's a dim dark thing.
of course most people(books), say that you can't see black holes, but you can!

On the other hand, you see all these book that say that gravity can't escape a black hole, and then you see "it only lets out some" or whatever, i've seen that alot and now i'm really confused

2007-11-23 14:26:13 · answer #6 · answered by Anonymous · 0 1

A black hole is black because light can't escape its gravity. Did that make sense? Probably not. X3

2007-11-23 12:06:05 · answer #7 · answered by Lynn 2 · 0 1

No light can leave from a black hole. So it will appear dark if you look at it.. Dark = black.

2007-11-23 13:31:26 · answer #8 · answered by Renaissance Kid 4 · 0 0

its not considered black it IS black.this is because there is sooooo much gravity that even light cannot escape so you don't see it.you can see thungs only if light bounces of it over here the light gets sucked into it.

2007-11-23 15:19:28 · answer #9 · answered by Ingenue Rabbit 2 · 0 0

1- Because when you fall in it you never see light again.

2- Because nobody likes him?

2007-11-23 12:21:54 · answer #10 · answered by autoglide 3 · 0 0

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