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A telescope equipped to photograph the sun.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
The plates were mounted in De La Rue's 'photoheliograph', a telescope that he had specially designed for photographing the Sun.
In 1910 the photoheliograph was mounted on the side of the Astrographic.
Numerous insets detail such subjects as Finding Longitude, The Photoheliograph, and short biographies of the primary scientists involved.
As for de la Rue, Stewart, and Loewy, their contributions with the photoheliograph at Kew were significant.