In this lab activity, you will precisely measure the sidereal day of Earth. We will do this activity together during class time.
Download this zip file with images. After downloading, double-click the zip file to expand it. Follow the instructions in the handout to analyze the motion of stars around Polaris, the North Star (or Pole Star). (Credit: Mario Belloni.)
You can download this spreadsheet to do your calculations.
Note that Polaris is not exactly stationary. It is close to, but not exactly at, the north celestial pole. Here's an article with photos and a description.