1. Supernova Ethan Fukuda Cody Tamura Period 1

2. What is a supernova? An exploding star reaching the end of its life They emit more energy than the sun will in its lifetime The blast is so bright, it will often outshine a galaxy for up to a couple of months

3. What is a supernova? On average, one will occur every 50 years in a galaxy In the universe, a star explodes every other second (that’s a lot)

4. The Sun The Sun does not have enough mass to turn into a supernova However, when it runs out of its nuclear fuel, it will turn into a red giant and vaporize anything in its path Then it will cool to a white dwarf

5. Types of supernovae Type I – a star gathers matter from a neighbor star until a nuclear reaction occurs Type II – a star runs out of nuclear fuel and implodes under its own gravity

6. Type I Lack a hydrogen signature in their spectrum of light Believed to originate from white dwarves Neighbor stars give off gas that collapses the white dwarf and a nuclear reaction occurs

7. Type I continued They lack hydrogen compared to other types of supernovas They are brighter than type II supernovas A white dwarf can only support a mass of 1.38 Solar masses, and if it goes above, it will start to collapse than explode Another way is if a white dwarf combines with another star, which is a very rare event

8. Type II Must be several times larger than the Sun At its death, a star will stratify the elements within itself They begin to implode The implosion bounces off the core and creates an explosion

9. Type II continued Because of this implosion, type II supernovas are known as core-collapse supernovas The difference between a type ll supernova and the other types of supernovas, is that hydrogen is present in its spectrum A type ll supernova is a massive star, which generates energy by nuclear fusion of elements

10. The Brightest Supernova It was seen September 2006, ground based telescopes and from NASA’s Chandra X-ray observatory. This was the biggest and brightest stellar blast ever recorded, and could be a newly discovered type of supernova. Scientists estimate that the explosion is equal to that of an explosion of a star with 150 times more mass than our sun.

11. Crab Supernova Video http://www.youtube.com/watch?v=0J8srN24pSQ

12. Works Cited Boyle, Alan. "Scientists Identify Brightest Supernova - Technology & Science - Space - Msnbc.com." Breaking News, Weather, Business, Health, Entertainment, Sports, Politics, Travel, Science, Technology, Local, US & World News - Msnbc.com. Web. 11 Jan. 2011.. "Girl Sets Record As Youngest Person To Find Supernova - Space News - RedOrbit." RedOrbit – Science, Space, Technology, Health News and Information. Web. 11 Jan. 2011.. "The Terminal Phases of Stellar Evolution and the Supernova Phenomenon." SAO/NASA ADS: ADS Home Page. Web. 11 Jan. 2011.. "What Is A Supernova? | Space.com." Space, NASA Information & News | Outer Space Flight Videos & Pictures | Astronomy, Solar System Images | Space.com. Web. 11 Jan. 2011..