Historical photographs

Refractor Observatory Learn from the experience

Refractor Observatory Learn from the experience


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The firm Alvan Clark and Sons, located in Massachusetts, became famous for its optical telescopes, at the end of the 19th century.

At the end of the 20th century, the main astronomical observatories include telescopes with lenses and mirrors manufactured by this firm, among which are included, the 24-inch Lowell Observatory refracting telescope; the refractor of the United States Naval Observatory, 26 inches; the 26-inch McCormick Observatory; Lick Observatory, 36 inches and the refractor of the Yerkes Observatory, 40 inches, the largest refracting telescope in the world.

Small observatories also have their place in the history of telescopes and many offer the public the opportunity to "look through a classic." This beautiful 8-inch refractor telescope, completely refurbished, was manufactured in 1927 by Alvan Clark and Sons. Every Thursday, he points to the stars from the dome of the Crosby Ramsey Memorial Refractor Observatory at the Maryland Science Center.

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