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