Medium level (H) calcium vapour

Made:: 1903 in Lake Geneva

photographer:: George Ellery Hale; F Ellerman

Medium level (H) calcium vapour, surrounding the great sun-spot of 1903, October 10, 9h. 39m. C.S.T. slit at 3966.5, suns diam = .77 metre, taken with the Rumford spectroheliograph and 40-inch refractor of the Yerkes Observatory by G.E. Hale and F. Ellerman

Details

Category:: Astronomy

Object Number:: 1912-420

Materials:: paper

type:: black-and-white prints (photographs), astrophotographs, sun and sun spots

credit:: Royal Astronomical Society

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Medium level (H) calcium vapour

Details

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