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spectroheliometer
spectroheliometer n.
Brit. 
/ˌspɛktrə(ʊ)hiːlɪˈɒmᵻtə/
, /ˌspɛktrə(ʊ)hiːlɪˈɒmᵻtə/U.S. /ˌspɛktroʊˌhiliˈɑmədər/
a spectrophotometer for use in studying the sun./ˌspɛktroʊˌhiliˈɑmədər/ΘΚΠ
the world > the universe > cosmology > science of observation > astronomical instruments > observational instruments > [noun] > sun
helioscope1675
heliostat1747
photoheliograph1862
photohelioscope1864
coronagraph1885
spectroheliograph1892
spectrohelioscope1906
spectroheliometer1973
1973 Sci. Amer. Oct. 76/2 The major experiments of Skylab include a spectroheliometer from the Harvard College Observatory that is mapping the sun at wavelengths of from 300 to 1,350 angstroms with a resolution of five seconds of arc.
1976 New Yorker 6 Sept. 40 The spectroheliometer showed that they extended up from the chromosphere..into the transition region between the chromosphere and the corona.
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