So I did a munar flyby for science, and it actually ended up slingshotting me into an orbit around Kerbin, so I waited for the mun to come back around, hoping it would throw my ship at Kerbin. It didn't. It ended up circling the sun, and I was wondering if it would ever come back to Kerbin if I let it sit. Its orbit brings it within approximately 38,947,006 km of each other (the shuttle and Kerbin). If I leave it alone after a while, will it come back, or are they stuck up there forever? (I'm also out of fuel). When answering this, if you could please explain how you know this, and how I can do the calculations myself. Thanks