This is the result of combining 859 pictures of the sky over several hours. With some help from a star app (I did not have my iPhone so used someone's) I pointed the camera toward Polaris, the North Star, to capture the stars rotating around in a circle. It was difficult as the North Star was behind the cliff across the Colorado River. There were so many stars, including the Milky Way, that the cliffs are silhouetted by star trails.