David Rittenhouse (1732-1796), American astronomer and inventor. He introduced spider's web as cross-hairs in telescopes and measuring instruments. He

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David Rittenhouse (1732-1796), American astronomer and inventor. He introduced spider's web as cross-hairs in telescopes and measuring instruments. He discovered the atmosphere of the planet Venus. Engraving 1896.

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Photo credit: © Universal History Archive/UIG/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: 1732-1796, 1896, american, astronomer, astronomy, atmosphere, cross-hairs, david, discovered, engraving, instruments, introduced, inventor, measuring, planet, rittenhouse, scientist, spider, telescopes, usa, venus, web