Wednesday, September 19, 2012

Alex writing 4

Stars

Stars are balls of hot gases.  These gases are hydrogen and helium.  Stars are HUGE.  The sun is a star.  It can fit 1 million Earths in it.  Atakareno is 100 billion times larger than the sun.  Betelguase is 1,000 billion times larger than the sun.  Uycnus-Majou is 1,000,000 billion times bigger than the sun.  Stars are different colors.  Blue is the hottest and brightest, yellow, second, red, third.  Stars start as a cloud of dust called a Nebula.  The gas inside swirls around.  Can you guess what force makes the gas move?  Guess! Guess! The force is gravity.

After a million years, all the gases form into a round ball .  It is a brand new star.  After several millions years, the star change from blue to yellow; after billions of years it changes from yellow to red.  The the star dies.  It may change to a white dwarf, supernova, hypernova, or a pulsar.  What are those?  We're just about to find out.  A white dwarf is a small ball of ice.  It is about the size of Earth.  The sun will become a white dwarf.  The comes supernova. It's when a giant star dies out.  It creates a huge explosion and forms another nebula.  A hypernova is when a humongous star dies and sets off Gamma Rays.  It creates a black hole.  A pulsar is created form the tiniest stars in the universe.  They send radio waves back and forth.  Why do stars dye? Well. stars die because they run on fuel just like fire.  Its fuel type is nuclear energy.  It smashes hydrogen atoms against hydrogen atoms it creates helium and released energy. 

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