During the supermoon I photographed an abandoned ski resort in the Lake Tahoe area. While we were scouting the location, photographer David Dasinger mentioned that he'd seen a 360 pano with reasonably long star trails. The full moon 360 night panos I've been shooting have typically been four exposures of 90 seconds, in order to keep the stars and shadows aligned when stitching. As an experiment, I shot a 360 night pano with four 6-minute exposures. The longer star trails stitched perfectly in PTGui. The ground required a little bit of extra retouching because the tree shadows moved during the long exposures. Other than that, I'm excited to report that it IS possible to have longer star trails in a 360 panorama.
Use the button on the bottom right to go full screen, and you'll see the stars circle around Polaris over the wood house. The star trails are diagonal to the east and west, and almost horizontal to the south. Zoom in just to the right of the supermoon, and you'll see our tents in the trees. More photos from this location soon.
Update 7/7/2013: Three additional panoramas have been added to create a virtual tour.