Title

A 23-inch refractor built by Alvan Clark

Caption

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

Date

19th century

Credit line

Photo12/Ann Ronan Picture Library

Reference

ARP23A16_209

License type

Rights managed

Available size

60,0Mb (9,6Mb) / 12,6in x 18,5in / 3786 x 5540 (300dpi)

Keywords

19th Century Engraving Engraved Illustration Illustrated Glass Test Testing Refractor Alvan Clark American America Astronomer Astronomy History of Astronomy Telescope Maker Telescope Telescopic Space Physics History of Physics Stars Star 19th Century