Time-lapse star trails in the night sky
Adam Rifkin stashed this in The Universe
Hat tip to Lauren Davis:
When cameras follow the paths of stars across the sky, they capture star trails, which look like glowing record grooves and give you a sense of the Earth's movement. Photographer Daniel Lowe spent two years collecting static images of star trails in western North Carolina, and collected them into one gorgeous video.
Static images of star trails have a wonderful otherworldliness, but the time lapse really helps convey the Earth's movement relative to these stars as the trails streak across the sky. Lowe also has a few of the still images used to make the video on his photo blog.