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I'm not sure, but the explanation was something something orbital mechanics.

If mars is on the other side of the sun, it would be a while before it swings back around.
I think?

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Either of you play Kerbal Space Program? That's where I learned all my orbital mechanics. But the answer is yes the planets need to be aligned, but mainly as a fuel saving maneuver to reach the planet with least energy expenditure

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No, that looks pretty cool, though.

The first season of The Expanse did a great job of portraying orbital mechanics.

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