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| 1. Turn off the daylight and horizon displays. Use the
"Planet" Palette to center on Jupiter and lock on
Jupiter. Use the "Settings" button to set Orientation
to Equatorial. Use the "Zoom" button to magnify
Jupiter until it is about 2 inches across on your computer
monitor and you can see cloud features clearly.
Set the time step to 10 minutes. Step forward in time
until the Great Red Spot is just about to disappear
around Jupiter's limb. Record the time. Continue to
step forward until the Great Red Spot has crossed the
disk of Jupiter again and is about to disappear around
the limb. Record the time. Subtract the two times to
find the rotation period of Jupiter. Compare your
answer with Table 12.1
2. Turn off the daylight and horizon displays. Use the "Planet" Palette to center on Saturn and lock on Saturn. Use the "Settings" button to set Orientation to Equatorial. Use the "Zoom" button to magnify Saturn until it is about 1 inch across on your computer monitor. Set the time step to 1 sidereal month. Step forward in time until you see Saturn's rings edge on. Record the date. Continue to step forward until you again see the rings edge on. Record the date. How much time has elapsed since the last date you saw the rings edge on? How is that amount of time related to the sidereal period of Saturn? |