4. The Galilean moons, compared to Earth's Moon
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The Galilean moons, compared to Earth's
Moon
Diamet Orbital Orbital
Mass
Nam er radius period
e
da
km % kg % km % %
ys
8.9 42
36 10 12 11 1.7
Io ×1 1,7 7
43 5 0 0 7
022 00
4.8 67
Euro 31 17 3.5
90 ×1 65 1,0 13
pa 22 5 5
022 34
14. 1,0
Gan
52 15 8× 20 70, 28 7.1
yme 26
62 0 10 0 41 0 5
de 22 2
10. 1,8
Calli 48 14 8× 15 82, 49 16.
61
sto 21 0 10 0 70 0 69
22 9
5.
6. Map of Jupiter's South Pole
Map courtesy NASA/JPL/Space Science Institute
This map of Jupiter is the most detailed global color map of the planet ever produced. A polar
stereographic projection showing Jupiter's south pole in the center of the map and its equator
at the edge, the map was constructed from images taken by Cassini in December 2000 as the
spacecraft passed on its way to Saturn.
7. New Red Spot on Jupiter
Photograph courtesy M. Wong and I. de Pater (University
Jupiter's Great Red Spot of California, Berkeley)
Photograph courtesy NASA A view of Jupiter taken by Hubble in May 2008 shows a
In 1979 Voyager 1 captured this photo of an immense new red spot (far left) on the planet's storm-roiled
high-pressure storm, called the Great Red Spot, surface. The new blemish, which appeared in spring of
swirling on Jupiter. Winds blow counterclockwise 2006, is significantly smaller than its older siblings, the
around the Great Red Spot at about 250 miles (400 Great Red Spot (center-right) and Red Spot Jr. Careful
kilometers) an hour. The storm is larger than one study of visible-light images like this one and others
Earth diameter from north to south, and more than taken in near-infrared light suggests that these red spot
two Earth diameters from east to west. storms rise high above Jupiter's atmosphere.
8. Newly erupted lava roils on the surface of Jupiter's moon Io in this false-color image taken on
February 22, 2000, by NASA's Galileo spacecraft. The orange-and-yellow ribbon is a cooling lava
flow more than 37 miles (60 kilometers) long.