Where Do Stars Come From?

There are estimated to be over 1 septillion stars in the universe, but how do stars become stars in the first place? Fraser Cain, publisher of Universe Today, explains how stars form. Beginning with the clouds of hydrogen and helium, and some heavy elements, left over from the Big Bang. Some collapsing clouds don’t have enough mass to become a star become brown dwarves. But a star with enough material can create enough heat and pressure to begin fusion.