California Institute of Technology
Nasa: Infrared Astronomy
A complete, multi-page tutorial on infrared radiation and its importance to astronomical studies.
Physics Central
Physics Central: Physics in the Living Room: Remote Control Tricks
An easy experiment through which students learn about light rays and the electromagnetic spectrum. Requires a TV, its remote, and a hand-held, flat mirror.
California Institute of Technology
Ipac: Iras Gallery
This site from IPAC is a series of images of various celestial objects and regions as viewed in infrared light. Each photo is accompanied by a caption.
NASA
Nasa: Mission: Science: Electromagnetic Spectrum: Infrared Waves
Infrared light lies between the visible and microwave portions of the electromagnetic spectrum. Infrared light has a range of wavelengths, just like visible light has wavelengths that range from red light to violet.
NASA
Nasa: The Space Place: Match Light Faces With Heat Faces
This site from the National Aeronautics and Space Administration provides information on the subject. "An infrared camera sees heat, rather than light. Can you match up the face in the infrared image with the same face in visible light?"
University of Wisconsin
The Why Files: Infra Red Eye Special
A description of the ways in which infra-red is used in astronomy, including an extended example describing how infra-red was used to learn about Pluto's moon, Charon. There are also links to other sites of astronomical interest.
California Institute of Technology
Cal Tech: Two Micron All Sky Survey
Learn about the Two Micron All Sky Survey project, in which telescopes and observatories scan the sky for infrared radiation in order to learn more about the Milky Way galaxy. The infrared spectrum is described and its importance to...