Tuesday, May 25, 2010

May 14 - North Star (METoC Day 1)





  1. How does that occur? That circular effect? Very cool!

  2. Basically, because of the Earth's rotation, all of the stars appear to "rotate" around the north star (Polaris). If you take a long enough exposure, you get star trails that show where the stars "move" as the night progresses. Of course, they aren't really moving, but rather the Earth is spinning.