A 20MP sensor is not the best for sky shots, I know, but posed the camera gimbal heads up, and using the drone as a tripod, with the aid of GPS signals, it shouldn't be so difficult to add a feature which allows to track the sky for long exposure night (sky) shots, at least at medium high latitudes, where the needed elevation is moderate.

+1 great idea.

Did you try this MaP59? What were the results like?