Section Of The Constellation Cygnus
by Metropolitan Museum of Art
Title
Section Of The Constellation Cygnus
Artist
Metropolitan Museum of Art
Medium
Photograph - Photograph
Description
Section of the Constellation Cygnus. August 13, 1885. Taken by Paul Henry (French, 1848-1905) and his brother Prosper Henry (1849-1903). Albumen silver print from glass negative. Astronomers at the Paris Observatory, the brothers Paul and Prosper Henry constructed a photographic telescope to produce an exact, objective record of the sky. That photography might serve astronomy was evident from the very beginning. Indeed, before the Henry brothers' first use of the medium, other photographers had successfully charted lunar geology, solar and lunar eclipses, the transit of Venus, sunspots, the surface of Mars, the rings of Saturn, and the relative position of the brightest stars. No one, however, had yet recorded stars so distant and faint that they were not visible to the eye. This the Henry brothers achieved in 1885 by constructing a still more powerful photographic telescope, with an extraordinarily precise mechanism for tracking the stars across the night sky during exposures as long as one hour.
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April 27th, 2017
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