"Infra" means "below" in Latin, and "red" is the color of the longest wavelength of visible light; the only light in the Electromagnetic Spectrum that human eyes can see. So … the name "infrared" means "below red!"
The science, engineering, and technology of Infrared Astronomy makes it possible for us to detect and study the infrared light emitted from almost everything in the Universe, even though the limits of the human eye mean that infrared light is invisible to us.
The Universe Awaits: EXPLORE IT IN THE INFRARED!
Published: 17 June, 2013