... In the night sky above are star trails etched by the rotation of planet Earth during the long composite exposure made with a modern digital camera. On the left, the center of the star trail arcs is the North Celestial Pole (NCP) , the extension of Earth's axis into space, with Polaris, the North Star , leaving the bright, short, stubby trail closest to the NCP. ... Publications with keywords: star trail . Publications with words: star trail . ... La Silla Star Trails North and South . ...