Nightscapes - Robert Arn
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Rotating Earth

Over the course of an evening, the stars appear to move in the night sky. This movement, however, is not the stars changing position, but rather Earth rotating on its axis. This image faces north, with Polaris, the north star being the brightest trail closest to the center of the light paths.

Location: Great Basin National Park
Date: 03-17-09
Camera: Canon XT
Mount: Still Tripod
Lens: Sigma 20mm f/1.8
Shot: 51x120sec @f/2.8 ISO 800
Processing: RAW Converter, Photoshop