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St. Louis Science Center: Astronomy Fact Of The Day: July 22, 2021
Jupiter's largest moon is Ganymede. It was discovered in 1610 by Galileo. Ganymede is larger than the planet Mercury and it is the only ...
July 22, 2021
Jupiter’s largest moon is Ganymede. It was discovered in 1610 by Galileo. Ganymede is larger than the planet Mercury and it is the only moon that has a magnetic field like the Earth’s. It is also one of the moons thought to have a subsurface ocean that is estimated to be about 60 miles thick.
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This press release was produced by St. Louis Science Center. The views expressed here are the author’s own.