Paris Observatory - Meudon 33-inch Great Refractor

Meudon 33-inch Great Refractor

See also: List of largest optical refracting telescopes and Paris Inch

The Meudon great refractor (Meudon 33-inch) was a 83 centimetres (33 in) aperture refractor, which with September 20, 1909 observations by E.M. Antoniadi helped disprove the Mars canals theory. It was a double telescope completed in 1891, with secondary having 62 centimetres (24 in) aperture lens for photography. It was one of the largest active telescopes in Europe.

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