Chapter 2 Notes

Chapter 2 Notes - Chapter 2: Solar Energy to Earth and the...

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Chapter 2: Solar Energy to Earth and the Seasons Milky Way Galaxy –  flattened disk shaped mass estimated to contain nearly 400 billion stars  Our solar system is embedded in one of the Milky Way’s spiral arms called the Orion Arm. A super massive black hole some 2 million solar masses in size named Sagittarius A* sits in the center. Our solar system condensed from  a large, slowly rotating and collapsing cloud of dust and gas called a a nebula. Gravity –  the mutual attracting force exerted by the mass of an object upon all other objects. Protosun –  grew in mass at the center Protoplanets –  swirled at varying distances from the center of the solar nebula. Planetisimals –  early protoplanets Planetisimal Hypothesis –  dust cloud hypothesis explains how suns condense from nebular clouds with  planetisimals forming in orbits about the central mass. Speed of Light – 
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This note was uploaded on 04/18/2008 for the course GEOG 101 taught by Professor Thebpanya during the Fall '07 term at Towson.

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Chapter 2 Notes - Chapter 2: Solar Energy to Earth and the...

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