Communication

9 relations: H-alpha, Hale Solar Laboratory, Helioscope, Mervyn A. Ellison, Solar observatory, Solar telescope, Spectroheliograph, Sunspot, Thomas Thorp (scientific instrument manufacturer).

H-alpha

H-alpha (Hα) is a specific deep-red visible spectral line in the Balmer series with a wavelength of 656.28 nm in air; it occurs when a hydrogen electron falls from its third to second lowest energy level.

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Hale Solar Laboratory

The Hale Solar Laboratory is a historic astronomical observatory at 740 Holladay Road in Pasadena, Los Angeles County, California.

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Helioscope

A helioscope is an instrument used in observing the sun and sunspots.

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Mervyn A. Ellison

Mervyn Archdall Ellison FRAS FRSE (May 5, 1909 – September 12, 1963) was an Irish astronomer.

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Solar observatory

A solar observatory is an observatory that specializes in monitoring the Sun.

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Solar telescope

A solar telescope is a special purpose telescope used to observe the Sun.

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Spectroheliograph

The spectroheliograph is an instrument used in astronomy which captures a photographic image of the Sun at a single wavelength of light, a monochromatic image.

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Sunspot

Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas.

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Thomas Thorp (scientific instrument manufacturer)

Thomas Thorp (1850–1914) was an English manufacturer of scientific instruments credited with inventing the first practical coin-in-the-slot gas meter, with innovations in the field of photography, including that involving colour, and for producing an early example of what has since been developed into the modern spectrohelioscope.

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References

[1] https://en.wikipedia.org/wiki/Spectrohelioscope

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