Nebula's Life Cycle
The life cycle of a star starts of with a nebula. Nebula's are made up of gas and dust, which slowly collects into a spinning cloud. This compresses to form a protostar, which is the birth place of a star. Next we have fusion ignition, the gases inside a protostar condense and eventually the heat and pressure causes the gases to ignite and this creates a star. We then move onto the main sequence, these are averaged sized stars in their youth. After a star has burned for awhile and has reached middle-age, medium-sized stars become red giants and large stars become red super-giants. Finally, there is the last stage in a star's life cycle, becoming a dwarf star or a black hole. Red giants will become dwarf stars and red super-giants become black-holes,