What weightlessness feels like on Zero-G planes The zero g plane, also known as a parabolic flight, or the vomit comet, flies in parabolic trajectories to give a brief experience of weightlessness. This flight, operated by Novespace in Bordeaux, France, offered 14 weightless parabolas, 2 parabolas with a simulation of moon gravity, and one with Mars gravity. I brought some demos to try out on the vomit comet, with little to no success. But who can ever prepare for these weightless things? Watch