<meta http-equiv="refresh" content="1; url=/nojavascript/">
Dismiss
Skip Navigation

Telescopes

Different types of telescopes use different part of the electromagnetic spectrum; some telescopes orbit in space.

Atoms Practice
0%
Progress
Practice Telescopes
Practice
Progress
0%
Practice Now
Astronomer Dr. Jill Tarter of SETI Institute
SETI listens for signs of other civilization's technology. Dr. Jill Tartar explains the program.

Reviews

Please wait...
Please wait...

Original text