Chapter 7

Chapter 7 - Chapter 7 Our Planetary System Earth, as viewed...

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Chapter 7 Our Planetary System Earth, as viewed by the Voyager spacecraft
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7.1 Studying the Solar System Our goals for learning What does the solar system look like? What can we learn by comparing the planets to one another? What are the major features of the Sun and planets?
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What does the solar system look like? 1. What is in it?
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Eight major planets with nearly circular orbits Pluto (dwarf planet) is smaller than the major planets and has a more elliptical orbit
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What Counts as a Planet? The IAU definition of a planet (2006): is in orbit around the Sun, has sufficient mass so that it is nearly round has "cleared the neighborhood" around its orbit.
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History of Planet Count The number of objects counted as planets in the solar system has varied over the centuries As low as 6 and has high as 13
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What does the solar system look like? 2. How far apart . are things? Planets are very tiny compared to distances between them.
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What can we learn by comparing the planets to one another?
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We can learn more about a world like our Earth by studying in context with other worlds in the solar system. Stay focused on
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This note was uploaded on 09/01/2008 for the course ASTRO 1 taught by Professor Butterwoth during the Spring '07 term at GWU.

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Chapter 7 - Chapter 7 Our Planetary System Earth, as viewed...

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