Chapter7.Survey of the Solar System

Chapter7.Survey of - Rocks near the middle • Rocks ice and gas farther out 15 The planets formed by the accretion of planetesimals and the

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1 Survey of the Solar System Chapter 7
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3 Forming Solar System
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11 The solar system formed from a cloud of cold gas and dust called the solar nebula about 4.6 billion years ago
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13 Faster Slower Why does the cloud of gas and dust become disk-shaped? As a rotating cloud of gas contracts, its angular speed must increase because angular momentum must be conserved (a fundamental law of Nature). Things that spin want to keep on spinning.
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14 Matter collects in the center where the temperatures increase (things are much cooler farther out from the center). Material gets separated out
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Unformatted text preview: Rocks near the middle • Rocks, ice and gas farther out 15 The planets formed by the accretion of planetesimals and the accumulation of gases in the solar nebula 16 How do we know this happened? Although we can’t go back in time and observe the formation of our own Solar System, we can observe other stars and planetary systems forming today. If this theory is correct, young stars should have disks of material that will later form planets proto-star proto-planetary disk (dust) surrounding nebula (gas) 17 18 19 20 21 Some extra-solar planets 22 23...
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This note was uploaded on 04/17/2008 for the course ASTRO 1504 taught by Professor Tabak during the Spring '08 term at Youngstown State University.

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Chapter7.Survey of - Rocks near the middle • Rocks ice and gas farther out 15 The planets formed by the accretion of planetesimals and the

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