The Life Cycle of Stars
We always knew what stars were, back in the Stone Age people would look up at night and see the stars. But what we didn’t know was that they lived and died like anything else on the earth.
external image NightSky.jpg

http://i12.photobucket.com/albums/a232/mgcypher/NightSky.jpg

When it was discovered?
In 185 A.D. the first supernova ever recorded was observed by Chinese astronomers. The Chinese knew that new stars could appear in the sky. So we can conclude that the first people to discover that stars lived and died were the Chinese.
How it helps us understand the Universe?
Knowing the life cycle of stars helps us in many different ways. It helps us understand why we sometimes see supernovas’. It explains why new stars appear in the sky and why sometimes stars disappear without the presents of a supernova.
Basic Information
The life cycle of a star starts in a nebula of gases comes together because of gravity and forms a protostar. Then for a protostar to move forward to the next level and become a star it needs to achieve equilibrium which is the balance between gravity and gas pressure pushing heat and light away from the core. Once this is achieved it becomes a star. After being a protostar, it moves onto the main sequence part of its life. We see most stars during the main sequence stage of their lives. During the main sequence stars give off heat and light caused by nuclear fusion. Next a star turns into a Red Giant. During this time in a stars life the surface is cool while the core is running out of fuel. Next the star either turns into a white dwarf or supernova depending on how big it is. After it is a supernova it turns into a black hole or neutron star.


external image starlife.jpg
http://www.blogiversity.org/blogs/gimmesomespace/starlife.jpg
Recent Discoveries

There are no recent new discoveries on the life cycle of stars.
Personal Views

I thought my topic was interesting but I had already learned some of the information in class. Though it does make me want to be able to observe a supernova at some point during my life.

Work Cited
http://www.telescope.org/pparc/res8.html
http://sunshine.chpc.utah.edu/labs/star_life/starlife_main.html
http://www.cnn.com/2006/TECH/space/09/26/supernova/index.html