jake+Stevenson

** Einstein's Theory of relativity 

**  ||  ||  // Albert Einstein theory of relativity is the principil that nothing is solid. And space and time can be measured and are not perfect. //  General relativity states that gravity, as well as motion, can affect time and of space. The main idea of general relativity, called the equivalence principle, is that gravity pulling in one direction is the same to an acceleration in the opposite direction. A car accelerating forwards feels just like gravity pushing you against your seat. An elevator speeding upwards feels just like gravity pushing you into the floor (Lightman).  General relativity is mainly about black holes and the universe. A black hole is a region of space whose attractive gravitational force is so strong that no matter, light, nor communication of any kind can escape (Lightman). Its believed that black holes are created from collapsed stars. Every star must spmetome burn out. When that happens, its unbalanced self-gravitational attraction makes it to collapse. According to theory, if a burned-out star has a mass larger than about three times the mass of our sun, no amount of additional pressure can stave off total gravitational collapse. The star collapses to form a black hole (Lightman). ||  distant galaxies in space ||    Beginning in 1917, Einstein and others applied general relativity to the structure and evolution of the universe as a whole. The leading cosmological theory, called the big bang theory, was formulated in 1922 by the Russian mathematician and meteorologist Alexander Friedmann (Lightman). One of the most stunning outcomes of the big bang theory was that it was predicted that the earth was ten billion years old. This was obtained by calculating the rate at which distant galaxies are flying away from each other. According to the big bang theory, the universe may keep expanding forever, if its inward gravity is not sufficiently strong to counterbalance the outward motion of galaxies, or it may reach a maximum point of expansion and then start collapsing, growing denser and denser, gradually disrupting galaxies, stars, planets, people, and eventually even individual atoms (Lightman). picture of a black hole  Albert Einstein's Theory of Relativity is two main theories, general relativity and special relativity. These theories helped in the understanding of black holes and the study of the universe. (lightman) "If it were not for Einstein, several decades might have passed before any physicist worked out the concepts and mathematics of general relativity." I believe that eventually we will know how and when our universe will begin to collapse if theories are correct.  <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;"><span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> I n November, 1919, Albert Einstein's idea of solar eclipse became famous. He confirmed that light rays from distant stars were bounced back by gravity of the sun. General relativity was the first new theory of gravity. Since Issac Newton 250 years earlier. General relativity was first known about in 1915, which came after Einstein's theory of special relativity. Special relativity states that distance and time are not absolute and can always be changed. The possibility of black holes were predicted based off of the theory of general relativity. A black hole is a region of space whose attractive gravitational force is so intense that no matter, light, or communication of any kind can escape. The possibility that stars could collapse to form black holes was first theoretically "discovered" in 1939 by J. Robert Oppenheimer and Hartland Snyder, who were manipulating the equations of Einstein's general relativity (Lightman).
 * <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> [[image:http://ts4.images.live.com/images/thumbnail.aspx?q=551075055275&id=0eef5b02c9a75ee1d3b9f92bcf9dcf7e width="124" height="160" caption="einstein.png"]]
 * <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> Einstein was a scientist who helped make new discoveries in modern science
 * <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> [[image:http://ts4.images.live.com/images/thumbnail.aspx?q=585877499463&id=eb9f40c58e223ab16503139f4442d411 width="160" height="112" caption="Galaxies.jpg"]]

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<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;"> <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;"><span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> //__images taken from,__// > > <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;"> ** <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> //__Lightman, Alan. "Relativity and the Cosmos." Nova. June 2005. PBS. > 29 Jan 2009.__// <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;">[|//http://www.pbs.org/wgbh/nova/einstein/relativity///]
 * <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;">//__All__// <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> //__www.bartleby.com/173__//  **<span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;">[|//**/**//]

<span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;"> //__>

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;">Annotation: I chose this site because it was reliable. it not only explained relativity in a way that i can understand, but it is also a commonly used source amoung our grade.__// <span style="font-family: 'Comic Sans MS', cursive; background-color: #002bff;">