These are a set of videos made using planetarium software to help you see how the stars and planets move over the course of months and years. See what you think and tell us what you learned by writing your comments in the box below.

What’s odd about these star trails?

You can really feel the Earth rolling around under you as you watch these crazy star trails.
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Download Student Worksheet & Exercises

Do the planets follow the same arc across the night sky? You bet! All eight planets follow along the same arc that the sun follows, called the ecliptic. Here’s how the planets move across the sky:


  1. If you have constellations on your class ceiling, chart them on a separate page marking the positions of the rocks with X’s.
  2. Tonight, find two constellations that you will chart. Bring them with you tomorrow using the technique outlined above in Experiment.


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2 Responses to “Star & Planet Trails”

  1. It’s actually the same worksheet for both, since they are both homemade star charting activities. Notice how the exercise questions reference the rock-string method from Star Charting?

  2. bryanshalonda says:

    The worksheet for Star Charting is linked in both this module (Star & Planet Trails) AND in the Star Charting module. Is there separate worksheets/exercises for Star & Planet Trails?