Engraving depicting a 23-inch refractor built by Alvan Clark (1804-1887) an American astronomer and telescope maker. Dated 19th Century

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Size: 3786px × 5540px
Location:
Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, alvan, america, american, archival, archive, astronomer, astronomy, century, clark, engraved, engraving, glass, historical, history, illustrated, illustration, maker, physics, refractor, space, star, stars, telescope, telescopic, test, testing