3. What do you think keeps the GRS spinning over such a long period of time? Explain. Next, we can determine the sizes of the GRS and LRS. In order to do this, you need to look at one of the still images from the rightmost panel. The boundaries of the frames on this website can be adjusted. For convenience, you can click and drag the border between the map image and the longitude scale. By dragging the scale up the image, it may be easier to make measurements. 4. Choose one of the later images between numbers 70 and 80. Since the Cassini space probe was approaching Jupiter while this sequence of images was taken, the later images are of better quality than the initial images. By comparing the longitudes of the eastern edge of a feature to the longitude of the western edge, the size of the object can be found. a) Find the diameter of the GRS in degrees (\"In longitude: b) Find the diameter of the LES in degrees ('3) longitude: 5. Jupiter's circumference is 4.5 x 1C!5 km This corresponds to a full 360 in longitude around the equator. Use this information to calculate the scale factor for converting degrees of longitude into kilomenter. Find the number of kilometers in every degree. Scale factor: kme'to Note that the scale factor in kmf" is most accurate for the equatorial region. As, you move further north or south of the equator, the less accurate this scale becomes. By projecting Jupiter's spherical surface onto a rectangle map, the latitudes towards the poles become more and more distorted and stretched out. 6. Use this scale factor from above and your diameter measurement of the GRSIIRS in question 4 to convert their diameters to km: a) Diameter of GRS: km. Show your work