Infrared
From Slackerpedia Galactica
Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. The name means "below red" (from the Latin infra, "below"), red being the color of visible light of longest wavelength. Infrared radiation spans three orders of magnitude and has wavelengths between approximately 750 nm and 1 mm.
It's very doable to use a cheap IR filter like the Hoya IR R71 (Actually its Near-IR) to take image of the Moon, the Moon looks very bright in IR because it reflects light from the Sun which is very rich in IR.
Most night vision equipment uses detectors that take IR light and converts it into optical light in the eyepiece.
