Europa: world of ice, world of water

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Europa world of ice, world of water(?)
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The Galileo spacecraft a much closer look
About 10 miles
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Grooves and ridges on Europa
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The grooves in color
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Ice rafts on Europa key to a subsurface ocean
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Speculations on interior structure of Europa
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Speculations on Europa of 4.5 Gyr ago
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How do we find out? The Europa Astrobiology
Lander

• Earliest possible launch 2035

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Io world of rapid changes

• Distance from Jupiter 422 thousand kilometers,
  diameter 3640 km

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Io

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

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Changes on Io