cosmic background radiation
solar radiation
cosmic infrared background
cosmic radiation
transparence
transparency
opacity
shortwave
sunlight
cosmic ray
background radiation
radiant
skylight
radiance
glow
glowing
photoinduced
ultraviolet radiation
electronic smog
ultraviolet
electromagnetic wave
ultraviolet illumination
ultraviolet light
solar constant
UV
astronomical telescope
radio telescope
actino-
Schumann resonance
radio reflector
ELINT
extragalactic background light
electronics intelligence
Chappuis absorption
deep space
emission spectrum
extraterrestrial
infrared spectrum
radiodosimetry
fluorescent
outburster
ultraviolet spectrum
insolation
astronomy
irradiate
radiopacity
radio-opacity
ray
radiopanspermia
absorption spectrum