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Astronomy  
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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 Hubble Space Telescope image reveals a small region inside the massive globular cluster Omega Centauri, which boasts nearly 10 million stars. This colorful assortment of 100,000 stars residing in the crowded core of the cluster is one of the... (View More)

This Hubble Space Telescope image of galaxies appears to form the number 10. The text describes the image and provides a brief explanation of why astronomer Halton Arp compiled his catalogue of odd-looking galaxies in the 1960s. In the accompanying... (View More)

Audience: High school, Informal education
Materials Cost: Free

This is an activity to reinforce concepts learned about the Sun, the Sun, Earth, and Moon system and eclipses. Learners will communally discuss their knowledge of these concepts briefly, and will then complete a series of worksheets and writings to... (View More)

Keywords: NSTA2013
Audience: Elementary school

This is a unit in 7-8 sessions about objects outside of our solar system, including galaxies and the universe. Learners will investigate the contents of the universe, why light years are used to measure distances in space, the lifespan of a star,... (View More)

Audience: Middle school

The Hubble Ultra Deep Field lithograph shows the deepest visible light observation of the early universe. In vibrant contrast to the image's rich harvest of classic spiral and elliptical galaxies, there is a zoo of oddball galaxies littering the... (View More)

This Hubble Space Telescope image shows the diversity of galaxies in the universe. A huge elliptical galaxy, designated ESO 325-G004, dominates the image. In addition to many elliptical and spiral galaxies, the image contains a few small irregular... (View More)

This is a lesson about size and scale, also called the Solar Pizza. Learners, or the facilitator, will cut out scaled images of the Sun and Earth and walk them approximately sixty-five feet apart to simultaneously show the size scale and distance... (View More)

Audience: Informal education
Materials Cost: Free

The lithograph contains a Hubble Space Telescope image that shows M82, an edge-on galaxy, undergoing a frenzy of star formation. The text explains the possible causes of the galaxy's unusual appearance and star-birth activity. In the accompanying... (View More)

Audience: High school, Informal education
Materials Cost: Free

The lithograph contains a Hubble Space Telescope image that shows the colorful Planetary Nebula NGC 2440 with one of the hottest known white dwarf stars at its center. The text briefly explains the process of stellar death of sun-like stars and... (View More)

Audience: High school, Informal education
Materials Cost: Free