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Sep 27, 2019 at 12:33 comment added Pierre Cathé Nitpick : you don't get energy for free in gravity assists, when you do a gravity assist from e.g. Jupiter, you're actually stealing speed from Jupiter, making its orbit slightly tighter. It's not a problem if you do it occasionnaly, but it might get dangerous when you start moving small moons around
Sep 26, 2019 at 20:05 comment added Arkenstein XII Consider the Interplanetary Transport Network. If you are willing to wait years for your goods to make their way across the solar system, transport can cost very little indeed.
Sep 26, 2019 at 19:10 history edited Halfthawed CC BY-SA 4.0
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Sep 26, 2019 at 18:49 history answered Halfthawed CC BY-SA 4.0