spectrohelioscope
radiograph
spectroheliometer
pyrheliometer
roentgenometer
reflector
pyranometer
solar telescope
photoheliograph
telespectrograph
bolometer
sunshield
infrared
spectroheliokinematograph
telespectroradiometer
radioprotective
irradiator
dosimeter
coronograph
solargraphic
pyrheliometry
astronomy satellite
radiotelemeter
photodetector
source of illumination
robodoc
ondoscope
radiospectrometer
actinometer
transilluminator
langley
solar tracker
misonidazole
X-ray telescope
absorptiometer
eclipsareon
radioprobe
transit
insolation
theodolite
teleotoscope
heliograph
photoscanner
photospectroradiometer
ionization chamber
ionization tube
radio observation
burning mirror
tanning bed
solar radiation