Circle of stars

When I was in the Sierra de Gredos, about a month and a half ago with Adrian, Ivan and Victór, in a while at night, while we had dinner I took the opportunity to make a circumpolar photography, unfortunately the camera was not long and there were not very large trails, but good, enough to show that the earth is not flat and have some movement in the stars in that beautiful environment, shortly after we were sleeping something and taking the VL until the light began to appear.

Sky: 98 shots of 30 seconds each.
Earth (Blue hour) 30 Seconds, Iso 800, F 5.6