Where is Polaris?
Stars do not move in space, but the planets, including Earth, rotate on their axis and revolve around stars like our Sun. While stars appear to be in different places in the sky from one night to the next, what has really happened is that Earth has shifted its position. In this project, you will use a camera to follow the stars. Normally when a picture is taken, the film is exposed to light for only a fraction of a second. In this experiment, the film will be exposed for 1200 seconds. To obtain a clear picture and avoid over-exposing the film, you must take the pictures at night in dark surroundings (no overhead lighting including street lights) with a clear sky and a view of the North Star (Polaris).
