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For questions about any non-flowing body of water in general. Rivers should use the [rivers] tag.

2 votes

How much of Mars is covered if 10 quadrillion tonnes of water fall on it?

Probably a few small seas Assuming an ice content of 50% (by mass, of course), Phobos has approximately 5.0916208 × 1015 litres of water, or about 5 quadrillion. Phobos is not 100% water, its surface …
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