Refractor

$Refractor: Moscow Planetarium, 1992$

$Refractor: The Potsdam Observatory, circa 1900$

$Refractor: George Bishop's Observatory, Regents Park, London$

$Refractor: Hevelius 150-foot Telescope, 1673$

$Refractor: Lick observatory, Mount Hamilton, CA$

$Refractor: Achromatic Refracting Telescope, c. 1831$

$Refractor: Hans Lippershey, German-Dutch Telescope Pioneer$

$Refractor: Hevelius 150-foot Telescope, 1673$

$Refractor: Yerkes Observatory, Wisconsin$

$Refractor: Yerkes Observatory, Wisconsin, 1937$

$Refractor: 40-inch Refractor Telescope, Yerkes Observatory, 1897$

$Refractor: George Ellery Hale, American Astrophysicist$

$Refractor: Lick observatory, Mount Hamilton, CA$

$Refractor: Dentists - Doctors - Inventors - Medicine - Science$

$Refractor: Duke of Edinburgh at Herstmonceux, Sussex$

$Refractor: Zoellner, Karl Friedrich, 8.11.1834 - 25.4.1882$

$Refractor: Gabrielle Renaudot Flammarion using refractor telescope$

$Refractor: Gabrielle Renaudot Flammarion using refractor telescope$