Part 0: Introduction and ship I was worried I'd run out of grand tour challenges to try after the real solar system, luckily the modding community is doing a good job. One year ago I found mention of the whirligig world planetary system, which I found very intriguing. Besides this unconventional starting planet, the whirligig system also includes a double star in close orbit, a hot Jupiter, sub-moons, trojan orbits, eccentric orbits. Seems a perfect next target for another