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Europa: world of ice, world of water(?)

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Presentation on theme: "Europa: world of ice, world of water(?)"— Presentation transcript:

1 Europa: world of ice, world of water(?)

2 The Galileo spacecraft: a much closer look
About 10 miles

3 Grooves and ridges on Europa

4 The grooves in color

5 “Ice rafts” on Europa: key to a subsurface ocean

6 Speculations on interior structure of Europa

7 Speculations on Europa of 4.5 Gyr ago

8 How do we find out? The Europa Astrobiology Lander
Earliest possible launch: 2035

9 Io … world of rapid changes
Distance from Jupiter = 422 thousand kilometers, diameter = 3640 km

10 Io Comparisons between Voyager (late 70s) and Galileo (mid 90s) showed geographical changes on Io (see figure 14.11)

11 Changes on Io

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