I obtained an Osmo+ for photographing auroras on a ship during a trip to the Arctic Ocean. Some of the photos are posted here. The auroras look pretty good, but there are star tracks. This seems contradictory -- how can there be star tracks (which indicate motion) if the gimbal remained still enough to produce good images of the auroras? I can think of only one possible explanation: when the exposure starts, there is briefly a little motion before the camera stabilizes, and this is sufficient for the relatively bright stars to produce tracks. If I go on another such trip, I might get someone to hold an obstructing screen in front of the lens and then move it just after I start the exposure.