Activity 1: Can We Find a Signal?
Activity 2: Riding the Wave
Activity 3: Understanding the Electromagnetic Spectrum
Activity 4: Cosmic Fingerprinting – Using Spectral Lines

Science on the Internet

Telesopes
Spitzer Space Telescope
Space Telescope Science Institute
NASA Telescopes Online Resources

Nebulae Images and Spectra
Gallery of Planetary Nebula Spectra
Wikipedia Planetary Nebula

SETI's Current Activities and Other Searches for Life
SETI@Home - Take part in the search!
Project Argus
The Planetary Society SETI Page
How Stuff Works - How SETI Works