Would a Moon made of water pose a threat to Earth during eclipses?
Is a moon made entirely of water possible?
Could a planet made completely of water exist?
I was inspired by the above questions to ask the following:
Assume that our current Moon is replaced instantaneously by a moon made entirely of water but of identical mass. This is carried out by an incredibly powerful passing alien who is driving drunk and wants to have a laugh.
Question
Before it had time to evaporate could it act as a lens during solar eclipses and focus the Sun's rays dangerously on Earth? Specifically if it was transparent enough, how could we determine the focal point?
Notes
I know that the focal point of a sphere is somewhat fuzzy but I don't know how this would appear on Earth or how a possible transition between ice/water at different depths and therefore pressures would affect things.
The refractive indices of ice and water are given below. I don't know if they are pressure-sensitive.
Refractive Indices
Water: 1.333
Ice: 1.309
This post was sourced from https://worldbuilding.stackexchange.com/q/131247. It is licensed under CC BY-SA 4.0.
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