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