Star Life Cycle

We can compare a star's life to a person's.  Just like a person, a star is born, ages, and eventually dies.  Huge cosmic clouds of gas and dust are where stars are born.  These are called Nebula.  Inside a Nebula a protostar is created.  Some protostars go on to be stars that live a long luminous life while other never make it to a star.

• If a protostar does not get big and hot enough it become a brown dwarf.  
• If it reaches a balance of gas burning (pressure out) and gravity (pressure in) it becomes a star.

Star Life Cycle Notes

Life cycle of a star video