Chapter 11: Problem 11
What kind of surface features are found on Mercury? How do they compare to surface features on the Moon? Why are they probably much older than most surface features on the Earth?
Chapter 11: Problem 11
What kind of surface features are found on Mercury? How do they compare to surface features on the Moon? Why are they probably much older than most surface features on the Earth?
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Get started for freeWhy is it reasonable to assume that the primordial atmospheres of the Earth, Venus, and Mars were roughly the same?
Use the Starry Night Enthusiast \({ }^{\mathrm{TM}}\) program to compare the orbits of Venus and the Earth. Select Options > Viewing Location. .. from the menu. In the Viewing Location dialog box, set the View from to a position moving with the Sun and choose the option Above orbital plane. Then click the Set Location button to close the dialog. Click on and hold the Increase current elevation button in the Viewing Location section of the toolbar until the distance shown in the Viewing Location display pane is approximately \(\mathbf{1 . 5}\) au from the Sun. Open the Find pane and click both of the checkboxes on either side of the listing for the Earth and for Venus. This labels the two planets and draws their orbits in the view. Close the Find pane. Stop time flow and set the time and the date to 0:00:00 UT on August 19, 2007 AD. You can zoom in and zoom out on these two planets and their orbits using the buttons in the Zoom section of the toolbar. You can also rotate the solar system by holding down the Shift key and then holding down the mouse button and moving the mouse. (On a two-button mouse, hold down the left mouse button.) Are the orbits of Venus and of the Earth in the same plane? At the time shown in the image, is Venus nearest to inferior conjunction, superior conjunction, greatest eastern elongation, or greatest western elongation as seen from Earth? Explain your answers. Rotate your view to look down upon the orbits from above the pole of the Sun. Are the orbits of Earth and Venus circular?
Water has a density of \(1000 \mathrm{~kg} / \mathrm{m}^{3}\), so a column of water \(n\) meters tall and 1 meter square at its base has a mass of \(n \times\) \(1000 \mathrm{~kg}\). On either the Earth or Venus, which have nearly the same surface gravity, a mass of \(1 \mathrm{~kg}\) weighs about \(9.8\)
Compare the volcanoes of Venus, the Earth, and Mars. Cite evidence that hot- spot volcanism is or was active on all three worlds.
How is Mercury's magnetosphere similar to that of the Earth? How is it different? Why do you suppose Mercury does not have Van Allen belts?
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