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| | Callisto (astronomy) - Hutchinson encyclopedia article about Callisto (astronomy) |
 | | The US space probe Galileo detected oxygen on Callisto in 1997, suggesting that its surface is made of water ice. |
 | | In 1998 Galileo's magnetometer measured electrical currents near Callisto's surface that are consistent with the existence of a buried salty ocean beneath the icy crust. |
 | | This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. |
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