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OpenStudy (anonymous):
Beginning with a nebula and ending with old age/death of a star, explain each step in a star’s life cycle.
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OpenStudy (praetorian.10):
A nebula is a cloud of dust and gas, composed primarily of hydrogen (97%) and helium (3%). Within a nebula, there are varying regions when gravity causes this dust and gas to “clump” together. Adding atoms to the center of a protostar is a process astronomers call accretion. Equilibrium for a protostar occurs when gas pressure equals gravity.
OpenStudy (praetorian.10):
kewl-kewl?
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