He invented the spectroheliograph in 1892, a device that allowed him to view the sun in individual wavelengths of light. |
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Basically, the spectroheliograph has two spectrographs mounted back-to-back. |
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The most important advantages of this form of spectroheliograph is the large field photographed. |
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Hale also gained prominence as an astronomer with his invention of the spectroheliograph and the discovery of magnetic fields in sunspots. |
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With his colleagues at Stanford University in the 1950s, Dr. Bracewell designed a specialized radio telescope, called a spectroheliograph, to receive and evaluate microwaves emitted by the Sun. |
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