Why are 1mm in diameter black holes weighing as much as Moon? It doesn't even fit! I mean, how much atoms can fit in 1mm object and how much in object of size of moon? What do blackholes do that they weigh so much?
It is not weight it is mass. You are right it does not fit. In a neutron star the material is squashed together so there is essentially a mass of neutrons with no space between the nucleons. It would seem that this is the most compacted a material can get. The problem is that if there is more mass added to the system then the force of gravity overcomes the Pauli Exclusion (this the name of the priciple that keeps one nucleon from occupying the same space of another nucleon) and the star continues to contract until it forms a black hole. How small will the volume of the mass become in a black hole, hard to say it may go to zero volume!?!PiotrSatan":87euz7ao said:Why are 1mm in diameter black holes weighing as much as Moon? It doesn't even fit! I mean, how much atoms can fit in 1mm object and how much in object of size of moon? What do blackholes do that they weigh so much?
Well, it's not quite like that. First of all, 1 mm is a LOT larger than a microbe, and a 1mm black hole won't have anywhere near the mass of Jupiter.PiotrSatan":20i9fr69 said:I know, I know but I was referring to massive mass of 1mm object, it's like some microbe had mass of whole Jupiter or something.
I think that it should be pointed out that black holes can and do gobble up matter. They do this the same way that stars form by way of an accretion disc. http://en.wikipedia.org/wiki/Accretion_disc I'm not sure the proccess is well understood but for some reason matter in such a disk looses enough momentum to fall out of orbit and onto the surface of the object it was orbiting. It also releases alot of energy in the proccess causing a fair amout of "fireworks". When supermassive black holes are gobbling up large amounts of matter this way they become some of the brightest objects in the universe. A galaxy with this proccess going on in it is said to have an active galactic necleus.Shpaget":r4mili2n said:....The exact same principle applies to stars orbiting black holes. They move forwards and continuously fall around the hole, but never hitting it.
The amount of gravitational pull doesn't matter. No matter how big it is, you only need to counter it with adequate forward motion and you're orbiting.