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In this lesson, students read the original paper written by Henrietta Leavitt in which she compared the apparent brightness and period of Cepheid variable stars. The students prepare graphs from numerical data, just as she did, and compare their... (View More)

This online module includes three activities: Spiral Shapes, Elliptical Slide, and Imagine Irregular. By completing these activities, students discover that galaxies come in different shapes and learn about the process used by astronomers to... (View More)

Keywords: Process skills
Audience: Elementary school, Middle school
Materials Cost: Free

In this interactive, online activity, students practice estimation skills as they begin to explore the Hubble Deep Field image. Students first give a rough estimate of the number of objects in the image. They then use representative sampling... (View More)

Audience: Middle school
Materials Cost: Free

This interactive, online activity allows students to examine the Hubble Deep Field image and simulate the process astronomers have gone through to classify the objects in it. Students classify select objects in the image based on observable... (View More)

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