Although we know a lot about the planets in our solar system, we have much more to learn. Scientists want to know more about the composition of the planets and their atmospheres. Some people wonder whether life ever existed on these lonely outposts.

Cassini


  • Now let's examine another spacecraft whose voyage is just getting underway -- Cassini. Click on Cassini to learn more about it.
    When will Cassini arrive in Saturn's neighborhood?
    2001 1998 2004

     How many times will Cassini travel around Saturn?
    about 75 times
    over 200 times
    once

    Press the button to see how well you did.

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