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Black Holes
by Ruby

Types of Black Holes

Schwarzschild is a black hole that has non- rotating axis. The Kerr black hole was named after Roy Kerrin 1963. Kerr is the simplest black hole. It only has a singularity to an event horizon. . Singularity is a black hole with collapsed holes. Kerr is the most common form in nature. A supernova black hole is actually a star that has blown up. The destiny of a supernova black hole. This is very slow!

How A Black Hole Is Created

When a star gives birth to a black hole. Several neutron stars have been found using radio telescopes. If the neutron is too big. It will explode.The neutron star continues to get small until it finally becomes a black hole. A supernova occurs every 300 years Neutron stars have been identified 500 years ago. When a star’s core collapses. It begins to pull  like a vacuum cleaner that you can’t see. As it moves nothing can get away not even light. There is a boundary line for this it is called a event horizon. John Archibald Wheeler invented the name “black holes. ’’ It seems to have stuck because it was much catchier than the previous names. Before John came along, the black hole was called “Frozen Stars’’. Black holes end point or star are at lest 10-15 times bigger then the sun.

About Black Holes

Scientists discovered that there is twice as much as a black hole than they imagined. They think that there is a super massive black hole in the center of our Milky Way. Light can travel 186 thousand miles per hour and it is not even fast enough for a black hole. It is not traveling fast enough to escape a black hole. So light gets sucked in and never comes out. More than a dozen black holes have been discovered in our Milky Way. A giant black hole is heavier than millions and millions of stars. The black holes are the most powerful objects in the universe. A black hole is an object in space that nothing can escape not even light. There is a boundary line for this black hole it is called an event horizon.

Black Holes Exist

Black holes exist, but it is impossible to see a black hole directly because the light can't escape from them. The black hole can sometimes camouflage. When a star burns out its fuel, it explodes into a supernova. The rest of the star collapse down to an extremely dense object. That we call the neutron star. An event horizon is an imaginary outer boundary of the black hole. In the event horizon nothing can escape.

Credits:

http://seds.lpl.arizona.edu/nineplanets/nineplanets/nineplanets.html
http://www.damtp.cam.ac.uk/user/gr/public/bh_intro.html
http://imagine.gsfc.nasa.gov/docs/science/know_l2/black_holes.html
http://cosmology.berkeley.edu/Education/BHfaq.html#q7
http://amazing-space.stsci.edu/resources/explorations/blackholes/lesson/whatisit/types.html
http://www.damtp.cam.ac.uk/user/gr/public/bh_intro.html
http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html
http://science.howstuffworks.com/black-hole2.htm
Pictures of Black Holes  http://cfa-www.harvard.edu/seuforum/bh_reallyexist.htm#
Picture of Supernova and neutron stars
http://www.windows.ucar.edu/tour/link=/the_universe/BH.html
http://en.wikipedia.org/wiki/Black_hole
http://en.wikipedia.org/wiki/Supermassive_black_hole
http://abcnews.go.com/2020/Science/story?id=2365372&page=1
http://www.universetoday.com/2006/10/24/black-holes-about-to-get-active-again/
http://www.daviddarling.info/encyclopedia/K/Kerr_black_hole.html