Supernova

__**= Supernova=**__

A supernova is an exploding star that when it explodes it can outshine the rest of its host galaxy  with large amounts of radiation for a short amount of time. When two binary stars rotate around eachother the white dawrf  star will start drawing matter from its stellar  companion, drawing so much matter (about 1.38 times the mass of the sun ) that it causes the star to collapse in on its self that it just imploads. Another way that a supernova occurs is when the star either has an imidiate stop or start in the creation of energy caused by nuclear fusioin. The white dwarf stars are also subject to another smaller type of nuclear explosion called a nova, a nova is very much like a supernova just much smaller. It also has many different types of chemicals then a supernova. Novae are more an explosion then a dying star. An of a nova is 1987A. A nova will become bright for a short amount of time and then it will return back to its original state. In the milky way galaxy and galaxies a lot like it there is about one supenova every 50 years, but in other galaxies there are much higher rates of supernovaes. These galaxies are monitered very closley for scientific purposes. The first supernova was seen by a Chinese astronomer in 185 A.D it was called SN 185, one of the most widley researched supernovae are the SN 1054  because it was the begining of the crab nebula. The rings around the supernova are just bursts of radiation.



Refrences Image 1- http://hubblesite.org/gallery/album/nebula_collection/pr2005037a/ Image 2- http://hubblesite.org/gallery/album/entire_collection/pr1995049a/

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