Ethan Fukuda Cody Tamura Period 1
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Transcript of Ethan Fukuda Cody Tamura Period 1
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SupernovaEthan FukudaCody Tamura
Period 1
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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
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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)
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The SunThe 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
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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
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Type ILack 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
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Type I continuedThey 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
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Type IIMust 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
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Type II continuedBecause 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
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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.
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Supernova Videohttp://www.youtube.com/watch?v=u2Uuqg-0jSk