It takes 668 Martian days for Mars to travel all the way around the Sun. If you moved to Mars, how many Earth days would it be before you had spent a whole Martian year there?

Answer 687 Earth days

Martian days are only about 39 minutes longer than Earth days. This means that while it takes 668 Martian days to travel all the way around the Sun, 687 Earth days have passed during that time.

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