Circumpolar stellar rotation

"Physics professor Jimmy Westlake took this picture on February 9th. 'After a one-hour exposure, I covered the lens for three minutes and opened the aperture for a final, 30-second shot,' said Westlake. This creates the effect of star trails punctuated by the stars themselves.

"'The volcanic rocks called the Yampa Buttes are silhouetted against the lights of the little town of Phippsburg, CO. The "W" of Cassiopeia is visible in the left side of the photo. Polaris marks the bull's eye at top right.'"

via Spaceweather, 11 Feb