1 entry 1 source
Spectroheliogram
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
A photograph of the sun made by monochromatic light, usually of the calcium line (k), and showing the sun's faculæ and prominences.
1 entry 1 source
Part of speech: noun (n.)
A photograph of the sun made by monochromatic light, usually of the calcium line (k), and showing the sun's faculæ and prominences.