Crossley telescope

Crossley telescope

Mosaic image of the Crossley telescope.
Alternative names	Crossley Reflector
Location	Santa Clara County, California, Pacific States Region
Coordinates	37°20′18″N 121°38′39″W
Discovered	Mayall's Object
Diameter	36 in (0.91 m)
Website	www.ucolick.org/public/telescopes/crossley.html
Location within the United States
Related media on Commons

The Orion Nebula, photographed with Crossley telescope by Keeler

The Crossley telescope is a 36-inch (910 mm) reflecting telescope located at Lick Observatory in the U.S. state of California. It was used between 1895 and 2010, and was donated to the observatory by Edward Crossley, its namesake.

It was the largest glass reflecting telescope in the United States for several years after its recommissioning in California. Lick Director, James Edward Keeler, remarked of the Crossley in 1900, "... by far the most effective instrument in the Observatory for certain class of astronomical work."