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It's as though Earth were a gas giant, but with the outer layers of hydrogen and helium blown away. The magnetosphere is closer in magnitude to Uranus's or Nept
by stephengillie 9y ago
It's as though Earth were a gas giant, but with the outer layers of hydrogen and helium blown away. The magnetosphere is closer in magnitude to Uranus's or Neptune's than Venus's or Mars's. We think it's why we still have water.
- zentiggr 9y agoThat makes me wonder - given that Jupiter and Saturn are so massive as to have solid cores, how do their core sizes compare to Earth's size? never compared those numbers, not sure where to find core size estimates for our four giants.