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Old 01-18-2017, 01:44 PM
Blue Blistering Barnacle Blue Blistering Barnacle is offline
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Join Date: Dec 2011
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How much easier would it be for Martians to deduce Heliocentric system? They would have an easy example of another body with a satellite. They have 2 moons themselves. They would have an extra planet with phases.

How about Kepler's laws?

I'm guessing Europans (at least the ones living on top of the ice) might do quite well.