Looking due north from central California we see here a time lapse of the night sky, or AstroLapse. The north star, Polaris, remains fixed 1/4 way up from the bottom center and the milky way rotates counter clockwise in this 5 hour segment compressed to 25 seconds in this movie. The fairly bright constellation of Cassiopeia which looks like an 'M' starts mid-right and appears to rotate around Polaris along with the milky way although it is the Earth that is doing the rotating.