Chapter 13: Problem 15
What is the Io torus? What is its source?
Chapter 13: Problem 15
What is the Io torus? What is its source?
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Get started for freeSuppose the Earth's Moon were removed and replaced in its orbit by Titan. What changes would you expect to occur in Titan's atmosphere? Would solar eclipses be more or less common as seen from Earth? Explain your answers.
In what ways does the system of Galilean satellites resemble our solar system? In what ways is it different?
Use the Starry Night Enthusiast \({ }^{\text {TM }}\) program to examine the satellites of Saturn. Open the Favourites pane and select Solar System \(>\) Saturn. Remove the astronaut's feet from this view by clicking on View \(>\) Feet. In this view you can rotate Saturn by placing the mouse cursor over the image of the planet, holding down the mouse button, and moving the mouse (on a two-button mouse, hold down the left mouse button). Use this technique to rotate Saturn so that you are viewing the rings edge-on. Then use the elevation controls in the toolbar (the buttons to the left of the Home button) to move closer to and further away from Saturn. This allows you to identify the satellites of Saturn, since they will appear to move whereas the distant stars will remain stationary as you move with respect to the planet. Alternately, you can reduce the confusion in identifying these moons by clicking on View \(>\) Stars \(>\) Stars to remove the stars from the view. You should be able to see at least eight satellites. Which satellites are these? (Move the mouse to center the cursor on a satellite and its name will appear. If you cannot see all eight, try moving further from Saturn (increase the viewing location elevation with the elevation button showing the Up arrowhead). (b) The plane of Saturn's rings is the same as the plane of Saturn's equator. Which satellites appear to be the farthest from this plane?
Explain why debris from Phoebe would be expected to pile up only on the leading hemisphere of Iapetus. (Hint: How do the orbits of these two satellites compare? How does the orbital motion of debris falling slowly inward toward Saturn compare with the orbital motion of Iapetus?) 38\. Saturn's equator is tilted by \(27^{\circ}\) from the ecliptic, while Jupiter's equator is tilted by only \(3^{\circ}\). Use these data to explain why we see fewer transits, eclipses, and occultations of Saturn's satellites than of the Galilean satellites.
Compare and contrast the surface features of the four Galilean satellites. Discuss their relative geological activity and the evolution of these four satellites.
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