a star is made of gas, what force holds the star togther, and what prevents it from collpasing from own weight

Answer 1

Gravity and they do collapse in time

Answer 2

In all stars gravity pulls inward holding everything together. In nomal stars the inward gravitational force is balanced by an outward thermal (hot gas) pressure. The high temperatures needed to create this high pressure are caused by nuclear fusion. In some old stars (white dwarfs and neutron stars) there is no longer nuclear fusion going on in the core, so the core does collapse. It collapses until it is held up by "degeneracy pressure", a quantum mechanics effect. In some very high mass stars even degeneracy pressure cannot hold up the star against gravity after the nuclear fuel in the core is exhausted, so the star collapses to become a black hole.

Answer 3

...but when it DOES collapse, you get a BLACK HOLE with gravity strong enough to distort TIME and SPACE (which means time is NOT an illusion!) and "they" say that a bucket of black hole substance is heavier than every car in the world put together. But here's the real twister...scientists believe that a WORMHOLE-that is, two black holes somehow connected, i guess-is a porthole to not only another where, but another when. Hold on, I'm almost done. Problem is, a black hole would just turn you into a piece of spaghetti or just plain ol' particles if you went into it. NOW we backtrack...ROSWELL (didn't see this one comin huh?)...a government employee who was a witness to the latter part of this farmer's field ufo crash incident made a report...he says he found a piece of metal from the crash that was "as thin as the foil found inside a cigarrette pack, yet virtually indestructible" and also very heavy. HMMM... If wormholes are the key to time travel, this would all connect and make sense if a species were to create a ship from INDESTRUCTIBLE METAL and use it to pass through the distorted timewaves!! If you read this whole thing, you're probably as screwed up as I am.

Answer 4

Gravity holds the star together and the outward pressure of nuclear fusion at its core (like an explosion) keeps the star from collapsing.