lecture 3 ppt

lecture 3 ppt - Solar System 1. Present theory suggests...

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1 Solar System 1. Present theory suggests that the universe is 15- 20 billion years old 2. Our solar system formed from rotating clouds of gas and dust 3. The sun is an average star 4. Composition of the planets depends on their closeness to the sun with closer planets more dense than those farther away. 5. Earth is third closest fifth smallest has a liquid center and crust on the outside. Factoids about light and the universe Speed of light 299,792 kmps (186,282 mps) Universe is 12 billion light-years across Milky Way Galaxy 100,000 light years across Our Solar System 11 light-hours across Moon is 1.28 light-seconds away Bottom line – light is fast and the universe is really big Our Solar System Figure 2.1 In August 2006 Pluto, was demoted to a s a "dwarf planet". If waas feared that the demotion was likely to upset the public, who have become accustomed to a particular view of the Solar System. Another planet? On August 5, 2005 astronomers announced that they discovered a chunk of rock and ice that may be the 10 th planet in our solar system The object, currently called 2003 UB313, orbits the sun and
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This note was uploaded on 04/25/2008 for the course GEOG 121 taught by Professor Long during the Spring '08 term at Wisc Oshkosh.

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lecture 3 ppt - Solar System 1. Present theory suggests...

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