spectroheliograph

instrument

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July 14, 2026

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A spectroheliograph is an apparatus used to create spectroheliograms. A spectroheliogram is a photograph of the Sun taken using monochromatic light, revealing features like faculae and prominences.12

The spectroheliograph was invented independently by French physicist Henri-Alexandre Deslandres in 1894 and American astronomer George E. Hale in 1891. This instrument allows for the photographing of the Sun in a single wavelength of light.34

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Henri-Alexandre Deslandres
…who in 1894 invented a spectroheliograph, an instrument that photographs the Sun in monochromatic light. (About a year earlier George E. Hale had independently invented a spectroheliograph in the United States.)
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…who in 1894 invented a spectroheliograph, an instrument that photographs the Sun in monochromatic light. (About a year earlier George E. Hale had independently invented a spectroheliograph in the United States.)
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George Ellery Hale
…thesis his design for a spectroheliograph, an instrument for photographing the Sun in a very narrow range of visible wavelengths (that is, monochromatic light).
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…thesis his design for a spectroheliograph, an instrument for photographing the Sun in a very narrow range of visible wavelengths (that is, monochromatic light).
Read More