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In this activity, a Whiffle® ball containing a battery-operated buzzer is twirled in a circle to demonstrate the Doppler effect.  The demonstration is an illustration of how stellar spectra can be used to measure a star's motion relative to Earth... (View More)

This activity introduces measurement and scale using hands-on activities. In this activity, students use the concept of similar triangles to determine the height of a tree. This activity is one of several available on an educational poster related... (View More)

This interactive, online module allows learners to study the history of the discovery of black holes. Learners may work independently or in small groups to complete the activity. By completing this activity students learn the history of the... (View More)

Gamma-ray bursts are distant explosions that briefly outshine the rest of the gamma-ray universe. In this lesson, students will follow the same procedures used by today's astronomers to determine two basic facts about gamma-ray bursts: their... (View More)

This activity is intended as a review of the concepts presented in the previous activities as well as an assessment of student understanding of the activities. Learners use the review information from the activities as they answer question and then... (View More)

In this activity, learners classify selected objects from the Hubble Deep Field based on their color and shape. They then compare their classification with a chart made by astronomers. This is activity two of four in the Hubble Deep Field Lesson... (View More)

In this activity, the problems and difficulties of determining the distances between Earth and objects in space is addressed. Learners attempt to arrange five objects from the Hubble Deep Field according to their distances from Earth. After making... (View More)

In this activity, learners practice estimation skills as they begin to explore the Hubble Deep Field image. They first give a rough estimate of the number of objects and then follow several steps, using representative sampling techniques, to improve... (View More)

This is an activity about assumptions and stereotypes. Learners will first sketch what they perceive an astronomer looks like. After, they will together discuss their images and research the preparation that is required to become an astronomer.... (View More)

This interactive, computer-based activity presents a series of inquiries that allow students to discover how the colors, masses, and luminosities of stars are related. Students also investigate how these characteristics influence the life cycle of... (View More)

Audience: High school
Materials Cost: Free
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