Drakkith said:It is difficult to explain unless you know a few basic concepts, such as what Mass is. As such, it is not a "hole" exactly, but a very massive object who's gravity pulls things in if they get too close, even light. The effect is almost exactly like you being pulled down to Earth all the time, but the strength is much much greater. The details can all be found in the 2 articles Joncon linked above.
Cbray said:Quick question - That it can pull light in, and because light bends due to gravity, does that mean a black hole would have to have an infinity depth?
Not sure of your intent here, but this is the kind of rhetoric which often leads people to the notion that black holes 'suck in' everything surrounding them. In reality, far away from the black hole the gravitational field behaves precisely like any other object.Whateverworks said:Because if its gravitation it pulls everything down into the hole and nothing escapes not even light which has an insane speed at 3x10^5 km/s.
I definitely wouldn't go so far as to say that the existence of singularities implies there is a theory beyond GR. It certainly suggests that something is wrong, and since we know GR is not a quantum theory that's the most promising avenue to explore, but it does not imply. It could be the case that singularities actually exist, but are always hidden behind event horizons (cosmic censorship hypothesis).The actual content of a black hole has collapse to what we call the singularity that's where in Einsteins theory we divide by zero. So Einsteins theory fail at the center of a black hole - that's why we know there's something beyond Einsteins theory's.
Cbray said:Quick question - That it can pull light in, and because light bends due to gravity, does that mean a black hole would have to have an infinity depth?
Whateverworks said:Einsteins theory we divide by zero.
/WeW
Lord Challen said:Einstein had a theory about dividing by Zero? Really? And I thought I was sort of out on a limb with that idea. Now I don't feel so stupid. I've been saying that for years and people just stop listening.
Cool. Thanks for that little nugget.
CosmicEye said:Hang on, what is GR if I can ask.
The reason why it is called a black 'hole' is becuase since it swallows light. Theoretically if we could actually see it, it would just be black because no light is coming from it, thus looking like a hole in space.
Personally I don't believe in wormholes, atleast in a BH. How could you go somewhere else in the U if you reach the center if you couldn't escape it in either direction. Also Infinite density is stupid because infinity is not a actual number. If it swallows stars then it gets that much more mass. Even if its 10^100 kg/m^3, its still not 'infinite'. Infinite depth is mind blowing too.
BH are very strange things and seem to void the current laws of physics. How fun.
CosmicEye said:What do you mean matter collapses in on itself, like the electrons impact its nucleus in the atom?
dcorbett said:"Black holes", physically, are extremely dense masses. How can one possibly fall into a "Black hole" ? Can one practice falling into a black hole by jumping into a pavement from a 10 storey building?
Technically, no. Black holes are not physical holes in the traditional sense. They do not have an opening or a bottom, and they are not empty spaces. Instead, they are extremely dense and compact objects with a gravitational pull so strong that not even light can escape from them.
Black holes are created when massive stars collapse under their own gravity at the end of their lives. As the star's core collapses, it becomes infinitely dense, creating a singularity at the center. This singularity is surrounded by a point of no return called the event horizon, which marks the boundary of the black hole.
No, we cannot directly see black holes as they do not emit any light. However, we can observe their effects on the surrounding matter and light. For example, as matter falls into a black hole, it heats up and emits X-rays that we can detect. We can also see the distortion of light around a black hole caused by its intense gravitational pull.
Yes, there are three main types of black holes: stellar black holes, intermediate black holes, and supermassive black holes. Stellar black holes are the most common and are formed from the collapse of massive stars. Intermediate black holes are believed to be formed from the merging of smaller black holes, and supermassive black holes are found at the centers of galaxies and can have masses equivalent to billions of suns.
No, nothing can escape from a black hole once it crosses the event horizon. This includes matter, light, and even information. However, some theories suggest that black holes may emit radiation called Hawking radiation, which allows for a small amount of particles to escape over time.