Explorations: Introduction to Astronomy (Arny), 6th Edition

Chapter 10: The Outer Planets

Thought Questions

1
Why do some astronomers think that Pluto should be considered a planet? Do you agree?
2
If Jupiter were moved closer to the Sun, what do you think would happen to it?
3
Why might Uranus and Neptune have proportionally less hydrogen than their more massive companions, Jupiter and Saturn?
4
Why do the relatively uncratered surfaces of Europa and Enceladus imply that these moons may have been "active" recently?
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