Because of gravity. Only gravity can pull large clouds together with enough force to overcome gas pressure.
stars
Clouds of dust and gas.
infrared light
New stars form from the interstellar gas and dust; mainly hydrogen and helium.
Stars form when there is a sufficient concentration of interstellar gas, to begin the process of gravitational collapse into a star.
All stars are formed the same way, by the condensation of large clouds of interstellar gas.
the cool clouds in which stars form.
stars
stars are born from interstellar gas clouds, shine by nuclear fusion and then die
stars are born from interstellar gas clouds, shine by nuclear fusion and then die
Stars. That is how stars are formed. They form from nebulae.
Clouds of dust and gas.
infrared light
There is no doubt that planets, stars, and solar systems could not ever have formed without gravity. All of these astronomical objects condensed out of clouds of interstellar gas and dust, under the influence of gravity. It is also true that planets orbit stars only because of the gravitational attraction of those stars.
We believe that stars form at the CENTERS of rotating interstellar gas clouds.
alot of different colors; it looks like a galaxy and has stars; stars form in a nebula, from collapsing clouds of interstellar gas and dust
New stars form from the interstellar gas and dust; mainly hydrogen and helium.