Supernova!

One of the most violent events in our solar universe is the death of a star. A supernova is an event that occurs when the core of a star experiences gravitational collapse or when there is a sudden reignition of nuclear fission. A supernova can take weeks or months to completely fade away. These blasts are extremely bright bursts of light that radiate outward violently creating a shockwave out into the surrounding interstellar space. Supernovas can outshine a galaxy for a brief moment and radiates as much energy in an instant that a star like our Sun radiates over its entire lifetime. Supernovas generate elements that are heavier than hydrogen and helium. These elements are thrown out into space, eventually being absorbed into another star or celestial body and carried off other places.  There are types of supernovas that you can read more about when you click: (Here). I will not get that in depth about them. A supernova as far as 3000 light years away (depending on the type of supernova) can potentially affect the Earth's biosphere. Even though this is highly unlikely, if gamma radiation resulting from the explosion hits the Earth, it would turn the Nitrogen in the atmosphere into Nitrogen Oxides, which would deplete the ozone layer, and expose the surface to harmful radiation. Long story short that would not be good for us! Candidates for supernovae in our own Milky Way Galaxy would be the following: Eta Carnae, RS Ophiuchi and Rho Cassiopeiae, Betelgeuse, and Antares. These stars are predicted to go supernova within the next million years. Lucky for us, our own Sun will not go out for the next 7 billion years. To learn more about supernovas and the death of our own Sun please go to the following links!

http://www.universetoday.com/107791/will-the-sun-explode/

http://en.wikipedia.org/wiki/Supernova#Classification

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