On 5/1/2020 10:59 AM, Vareck Bostrom wrote: > but then again the Regina planetary > and moon system as described in Book 6: Scouts as well as the T5 > version of that system are both dynamically unstable as well. In the > T5 variant, Regina orbits too far from Assiniboia and will be > perturbed out of its orbit and into solar orbit and in the Book 6 > version the inner moons rapidly destabilize each other: they're quite > massive and not in a MMR. So the existence of planetary drives might > actually be in heavy use throughout the Imperium. Or the people who came up with the 3I didn't have the same level of knowledge and rigor (and hindsight) we apply to the setting, and just went with what was known at the time or simply Rule of Cool. At this point, we've had 40+ years for science to advance and bored nerds to obsessively chew over and nitpick stuff that was probably thought up in an afternoon, on deadline, or straight-up copied from someone's favorite book(s). -- --------------- Kelly St. Clair xxxxxx@efn.org