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Unformatted text preview: 9. If the Sun was twice as massive as it actually is, but the Earth remained at the same distance, what would the change in the length of the year be? 10. If the Earth was three times as far away from the Sun as it is, how long would the year be? 11. Why was Galileos discovery of the satellites of Jupiter signiFcant to the heliocentric model? 12. Why is Pluto not considered a planet anymore? Representative review questions, Chapter 2: 9, 14, 17, 18, 20 Representative self-test questions, Chapter 2: 10, 16, 17, 18, 19 Representative problems, Chapter 2: 1, 8, 12, 14, 15 (part one)...
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