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 Post subject: Ganymede's deep ocean
PostPosted: Sat Mar 14, 2015 10:15 am 
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Location: Lancashire
Nasa announced this week that data from new Hubble observations of the satellite's magnetic field indicates that Ganymede, the biggest moon in the solar system, has a saltwater ocean, reckoned to be sixty miles deep ( ten times deeper than Earth's ), beneath a ninety-five miles thick crust of ice.
Ganymede's ocean appears to have more water than all of Earth's water. Europa is known to have an ocean, but Ganymede's was speculative since the 1970s, due to lack of data from Galileo's brief fly-by.

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PostPosted: Sat Mar 14, 2015 7:31 pm 
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. If the Earth had double the amount of water it has now, I presume that there would be no land at all.
I suppose then we would all be fish.

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PostPosted: Mon Mar 16, 2015 11:08 am 
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Our first vertebrate ancestor was a little fish, but could there really be life under Ganymede's enormously thick crust of ice?

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