spectroheliography


spec·tro·he·li·o·graph

S0618500 (spĕk′trō-hē′lē-ə-grăf′)n. An instrument used to make spectroheliograms.
spec′tro·he′li·o·graph′ic adj.spec′tro·he′li·og′ra·phy (-ŏg′rə-fē) n.

spectroheliography

(ˌspɛktrəʊˌhiːlɪˈɒɡrəfɪ) n (Astronomy) the process of obtaining an image of the sun in light of a particular wavelength, such as calcium or hydrogen, showing the distribution of the element over the surface and in the solar atmosphere, using a spectroheliograph