Well, think of how elements are created: You start off with
hydrogen and helium (seems like they're the two basic elements).
Giant molecular clouds are where stars are born. Irregularies
means there are some clumps of hydrogen or helium molecules
floating around a little moe densely. Gravity pulls them
together, at first slowly then faster and faster and faster as
it gets more dense. Suddenly - k...a-blam - nuclear fusion
occurs and a star is born. the hydrogen in the core fuses to
form helium, then the next heavier element and next heavier
element. Then, once the core of the star is IRON it can't hold
itself together anymore. if its big enough, KA-BOOM - SUPERNOVA.
Not only are all the layers of elements from hydrogen to iron
dispersed from the explosion, but even HEAVIER elements are
CREATED in the explosion. Our sun and the planets, and us... "
