how where stars formed?

Answer 1

That's a long explanation. Start here:

http://en.wikipedia.org/wiki/Star

Answer 2

The two main theories of stellar formation both begin with the idea that huge fields of gas in space gradually coalesce, and eventually gain enough mass to become stars. The image of this over time is that of a huge spiral ring of gas eventually breaking into a central star and planets. As another of the posters suggested, it is theorized that large planets occasionally have their masses increased in collision with other bodies, giving them sufficient mass for the nuclear process to begin.

A star is a nuclear furnace afte rall, and requires sufficient mass for the process of fusion to begin.

Answer 3

That is a little out of my strength. But it goes something like this. If something were to collide with Jupiter that would double its mass Jupiter could turn into a star.

Answer 4

a star is formed when gas is compacted by gravity and it becomes extremly hot