Day 119: Star Distance and Parallax

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Astronomy students investigated parallax today with an activity that was as much direction following as anything! They looked at how distance to a star changes the parallax angle and how changing the baseline changes the parallax angle. In the photo above they use holes punched in card stock to change the baseline.

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When we returned to the room I had the students gather around and we did the same but used an iPhone to shoot two photos. The lens was 3 cm on either side of the mid line. Note the tip of the pencil (near star) seen against a different background of more distant stars.

 

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