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The Big Bang Theory and Nebular Hypothesis
Transcript of The Big Bang Theory and Nebular Hypothesis
Block 1 White http://scifi.soentertain.me/wp-content/uploads/2012/03/logo.jpg Scientists have found evidence that the universe is expanding and galaxies are moving further apart. A way to show this expansion is by visualizing a balloon (representing the universe) with dots (representing galaxies) on it. As the balloon is blown up, the dots move further away from each other.
The widely accepted theory of the creation of the universe, the big bang theory, was created due to this evidence of an expanding universe. Earth Science Textbook http://scienceblogs.com/startswithabang/files/2011/07/R9800255-Expanding_universe_computer_artwork-SPL.jpeg What is the Big Bang Theory? Scientists believe that before the big bang, the whole universe was confined to one point in a small, super massive ball.
About 14 billion years ago, an explosion occurred, releasing all of the universe's matter, causing rapid expansion. http://www.umich.edu/~gs265/bigbang.htm http://nothingoutofnothing.files.wordpress.com/2010/05/bigbang.jpg The big bang was the "birth of the universe" because in that instant, all matter and space was created.
The masses of gas released during the big bang cooled to form stars and galaxies. Aftermath of the Big Bang Earth Science Textbook http://twistedsifter.sifter.netdna-cdn.com/wp-content/uploads/2009/12/the-big-bang-and-creation-of-the-universe.jpg The nebular hypothesis is the belief that our solar system was created about 5 billion years ago from a cloud of gas and dust, the remains of a supernova. Pressure caused the cloud of gas and dust, known as a nebula, to begin collapsing and gravity forced the dust and gas together to cause a solar nebula. Nebular Hypothesis http://www.dailygalaxy.com/.a/6a00d8341bf7f753ef01538f79345d970b-800wi http://www.windows2universe.org/our_solar_system/formation.html The solar nebula began to spin and continued collapsing. The core eventually grew hotter and denser and a ring of gas and dust surrounded it. As the disk decreased in size, particles began sticking together causing clumps that would later form the planets and their satellites. Nebular Hypothesis http://www.windows2universe.org/our_solar_system/formation.html http://i.space.com/images/i/10428/i02/solar-nebula.jpg?1308851067 Near the center of the cloud, where temperatures were higher, planets composed of rocky materials, such as Earth, formed.
Rocky and icy material settled around the edges of the cloud, where it was colder, to form the larger planets, such as Jupiter.
The cloud continued to collapse and became so hot that it formed a star, our sun, and blew the remaining gas and dust into the solar system. Nebular Hypothesis http://www.windows2universe.org/our_solar_system/formation.html http://www.agu.org/sections/planets/images/articles/Wasson/YoungPlanetarySystem.jpg http://scifi.soentertain.me/wp-content/uploads/2012/03/logo.jpg
earth science textbook