Geography 2152F/G Lecture Notes - Lecture 9: Photosphere, Breccia, Kuiper Belt
14 Feb 2019
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Document Summary
Scientists believe a cloud of gas and dust in space was disturbed by a supernova: when did this occur, 4. 6 billion years ago. This caused a formation of a solar nebula (a flattened cloud of gas and dust). The center of the solar nebula grew hotter resulting in the formation of the sun. The outer edges cooled causing clumps of particles to stick together and form planets. Components of outer space: galaxy: a cluster of billions of stars. Our solar system makes up a tiny portion of the milky way galaxy. Star: a hot glowing ball of gas that generated energy by converting hydrogen to helium. The sun is located approximately 30 quintillion km from the center of the. It takes light nearly 100,000 years to travel from one side of the galaxy to the other. In the core of the sun, the temperature is 15 million degrees celsius.
