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Q&A

How would seasons work on a moon orbiting a gas giant orbiting a star?

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Let us assume a sufficiently earth-like moon, like Europa. It orbits a gas giant. The whole setup is within the star's goldilocks zone, so the moon is theoretically habitable.

'Day' is one rotation of the moon around itself, 'month', for the sake of the argument, is one rotation of the moon around its planet, and 'year' is the planet going once around its sun.

Days would be completely dark for a certain portion of the month, I guess, since the planet would eclipse the sun, right? While completely light days would work similar to the way they do on Earth, provided there's no eclipse?
What I cannot figure out is how seasons would work, and whether they would exist at all. When would it be warmer/cooler?

Please, I would very much appreciate an answer in layman terms. I have found answers to similar questions filled with formulae I couldn't make heads or tails of.

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