Spectroheliograph

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Spectroheliograph

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An instrument for taking photographs (spectroheliograms) of the image of the sun monochromatic light. The wavelength of light chosen for this purpose corresponds to one of the Fraunhofer lines, usually the light of hydrogen or ionized calcium. A similar instrument used for visual, instead of photographic, observations in a spectrohelioscope. </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use