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The Global Telescope Network (GTN) is an informal association of scientists, students, individuals and observatories interested in supporting the NASA Fermi Gamma-ray Space Telescope (formerly GLAST), Swift, and XMM-Newton missions by obtaining and... (View More)

Audience: Informal education

This Hubble Space Telescope image reveals new details of the Cat's Eye Nebula, one of the most complex planetary nebulae ever seen. A planetary nebula is the glowing gas ejected by a star similar in mass to our Sun, during its final stages of... (View More)

In this activity, students explore the idea of classifying objects. They start by giving examples of objects that can be classified in everyday life and in science. They then characterize and classify a set of galaxies using their own scheme, and... (View More)

This Hubble Space Telescope image shows a tightly packed crowd of stars resembling a swarm of bees. Called M80 (NGC 6093), the stellar swarm is one of the densest globular clusters in our Milky Way Galaxy. M80 contains hundreds of thousands of... (View More)

Audience: High school, Informal education
Materials Cost: Free

This image from the Hubble Space Telescope shows light from hot stars eating away the surface of the dust and gas cloud in this region of the Eagle Nebula to reveal a pillar composed of denser material. The text includes information about the... (View More)

Audience: High school, Informal education
Materials Cost: Free

This is a lesson about the temperature on differnt planets in our solar system. Learners will explore the planetary temperature system. They explore how each aspect (e.g., mass, temperature and gravity) influences the system and the consequences of... (View More)

Audience: Middle school

This is a lesson about the amount of atmosphere a planet is likely to have. Learners will look for the relationship between atmospheric mass and other characteristics of the planet. When the results are not completely conclusive, the students... (View More)

Keywords: habitable zone
Audience: Middle school

This is a lithograph about a scientific observation by the Reuven Ramaty High Energy Solar Spectroscopic Imager, or RHESSI, spacecraft. Learners will read about a chance observation of a gamma-ray burst in 2002 that has shed new light on the... (View More)

This 2-page color fact sheet briefly describes NASA's Kepler mission, its instruments, and ground system. Also included are tables listing the instrument parameters and the major institutions involved. Kepler is a spaceborne telescope specifically... (View More)

Audience: Informal education

This interactive, online activity allows students to explore Hubble's deepest surveys of the far universe and distant galaxy surveys made by Hubble and other observatories. This activity includes science content reading material for the online... (View More)

Audience: Middle school