Life Cycle Of Stars

By: Zhi He

First Cycle Of The Star

Stars have a life cycle just like people. Stars start as a proto-star, a large mass formed from a interstellar medium. It then goes through fusion ignition, form there going into the main sequence. After it breaks out of the main sequence it will turn into a red giant, before turning into a white dwarf.


http://evansscienceblog.blogspot.com/2012/05/its-stars-life.html

Intersteller Medium

The Interstellar Medium is the material that fills the space between the star. The Interstellar Medium is made up of gas in Ionic, atomic, and molecular form, as well as dust and Cosmic Rays. The Interstellar Medium is in intergalactic space.


http://spiff.rit.edu/classes/phys230/lectures/ism_dust/ism_dust.html

Main Sequence

Main sequence stars are stars that are fusing hydrogen atoms to form helium atoms in their cores.Main Sequence is when the star produce the most energy. After main sequence they're going to get old

http://www.space.com/22437-main-sequence-stars.html

Red Giants

In only a FEW BILLION years our sun will turn into Red Giants. In Red Giants temperature increases, eventually it's reach a level till helium can fuse into carbon. Depending on the mass of the star helium burning might begin with a explosion flash.


http://www.astronomycafe.net/qadir/q2958.html

White Dwarf

White Dwarf star is when the star reaches its oldest age. All the energy is use up, they're just siting in our universe. A white dwarf star's weight is same as our sun's weight. Stars eventually blow off the material of their outer layers, which creates an expanding shell of gas called a planetary nebula.


http://cseligman.com/text/stars/planetary.htm