Astronomy-Ch12.pptx - COLLEGE PHYSICS ASTRONOMY Chapter #...

COLLEGE PHYSICS
Chapter # Chapter Title
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ASTRONOMY
Chapter 12 RINGS, MOONS, AND PLUTO
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FIGURE 12.1
Jupiter Family. This montage, assembled from individual Galileo and Voyager images,
shows a “family portrait” of Jupiter (with its giant red spot) and its four large moons.
From top to bottom, we see Io, Europa, Ganymede, and Callisto. The colors are
exaggerated by image processing to emphasize contrasts. (credit: modification of work
by NASA)

FIGURE 12.2
Moons of the Solar System. This image shows some selected moons of our solar
system and their comparison to the size of Earth’s Moon and Earth itself. (credit:
modification of work by NASA)

FIGURE 12.3
Callisto.
(a) Jupiter’s outermost large moon shows a heavily cratered surface. Astronomers believe that the bright areas are mostly ice, while the
darker areas are more eroded, ice-poor material.
(b) These high-resolution images, taken by NASA’s Galileo spacecraft in May 2001, show the icy spires (top) on Callisto’s surface, with
darker dust that has slid down as the ice erodes, collecting in the low-lying areas. The spires are about 80 to 100 meters tall. As the
surface erodes even further, the icy spires eventually disappear, leaving impact craters exposed, as shown in the lower image. (credit a:
modification of work by NASA/JPL/DLR; credit b: modification of work by NASA/JPL/Arizona State University, Academic Research Lab)

FIGURE 12.4
Ganymede.

FIGURE 12.5
Evidence for an Ocean on Europa.
(a)