spectroheliometer
spectrohelioscope
radiograph
pyrheliometer
solar telescope
coronograph
solargraphic
pyranometer
transilluminator
pyrheliometry
telespectroradiometer
photoheliograph
heliograph
astronomy satellite
coronagraph
helioscope
burning mirror
solar tracker
catch the sun
filtergram
spectromagnetograph
astrolabe
actinometer
sunbed
solar radiation
langley
spectroheliograph
tanning bed
metrochrome
absorptiometer
Phoebean
spectroheliokinematograph
wavemeter
reflector
radiospectrometer
spectrogram
ultraviolet astronomy
ultraviolet lamp
ultraviolet source
sunshield
telephotometer
telespectrograph
roentgenometer
Wollaston prism
Rochon prism
coronagraphy
infrared
astronomical telescope
Sun
sun