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It takes billions of years for molecules of Hydrogen, floating around in space, to come together in sufficient mass to eventually coalesce into a protostar (the first stage)--it usually takes another event, such as the shockwave from a supe...
http://wiki.answers.com/Q/How_are_stars_made
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Stars are formed in Nebulae (the plural of nebula)....
http://wiki.answers.com/Q/Where_are_stars_formed
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Stars are formed in two different ways. First way is gravitational collapse in which clumps that are heavier than the sun, fragment into gaseous cores then collapse to make individual stars. The second way is called competitive accretion in...
http://answers.ask.com/Science/Astronomy/how_are_stars_...
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Stars form by the gravitational collapse of interstellar gas. This gas in normally in the form of a molecular cloud which is about 75% Hydrogen, such as the Orion nebula. The process that triggers star formation is not well known but it mig...
http://answers.yahoo.com/question/index?qid=20071230123...
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Massive stars are formed the same way that a smaller star is. However, there are differences. Like a smaller star, they begin by gathering and condensing into a huge globule of dust and gas, thus contracting under its own gravity.
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merlin.alfred.edu/muller/FormerPhysWorld/PhysWorld/Proj...
merlin.alfred.edu/muller/FormerPhysWorld/PhysWorld/Project3/StarFormation/howstars.htm
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Observations of the interstellar medium, together with calculations of stellar models have led astrophysicists to assemble a theory of how stars are born and why they shine. The theory of stellar genesis has been successful in explaining how stars are formed in vast clouds of interstellar gas and dust.
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www.ph.surrey.ac.uk/astrophysics/files/how_stars_form.h...
www.ph.surrey.ac.uk/astrophysics/files/how_stars_form.html
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How Stars Are Formed ... Out of the Darkness: Classical T Tauri Stars ... From Disks to Planets: Weak-lined T Tauri Stars...
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helios.augustana.edu/~lc/star1.html
helios.augustana.edu/~lc/star1.html
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Sampling clusters of stars in an older, "fossil starburst" region, astronomers concluded that the galactic violence between M82 and M81 began some 600 million years ago and lasted about ... Astronomers once thought that this type of cluster only formed during the early stages of galaxy evolution many billions of years ago.
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www.sciencedaily.com/releases/2001/03/010308073008.htm
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