Airborne & Space Telescopes
Backgrounders
Learn about telescopes that do their work high in Earth’s atmosphere and in space.
Optical Telescopes
Backgrounders
Learn about the history of telescopes and the function of refracting and reflecting optical telescopes.
Radio Astronomy
Backgrounders
Learn about radio astronomy, a type of astronomy that studies objects in space using radio waves and radio telescopes.
Carl Dixon
Career Profiles
Naval Communicator
Keven Bruce
Career Profiles
Tactical Weather Specialist
Alexis Dorais
Career Profiles
Remote Sensing Analyst
The Optics of Telescopes
Backgrounders
Learn about telescopes, how they work & why they're important to astronomers.
Why is everything so small down there?
Hands-on Activities
Explore how we see things far and near and from different angles. It's all about perspective!
The Search for Extraterrestrial Intelligence - and How You Can Help!
STEM Explained
When astronomers search for extraterrestrial life, they often have to listen for radio waves coming from deep space. If you’re interested, you can help!
Space Junk
STEM Explained
Litter isn't just a problem on Earth. When litter ends up in space, it can cause collisions and other consequences for satellites, the International Space Station and even for people on Earth!
Dealing with Asteroids and Other Space Hazards
STEM Explained
Find out how asteroids, space debris, and cosmic radiation can be dangerous, and how to monitor them and protect ourselves from these space hazards.