I’m participating in Inktober this year! Be sure to check out my Tumblr or Instagram accounts if you would like to keep posted.
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A while back, I was talking with a friend about ring-shaped worlds, how they might work, and ideas about how inhabitants would move about. One thought involved a moon held in the center, which could be used as a gravitational slingshot to move from one end of the planet to the other with less fuel.