The Clark Telescope Dome on Mars Hill at the Lowell Observatory in Flagstaff, Arizona
Photograph of two domed buildings on a mountaintop; they contain telescopes that are part of the McD...
View of Old Main building roof on the University of Arizona campus located in Tucson (Ariz.)
The rear view of Walsh Hall with the domes of Ricard Observatory visibleThe rear view of Walsh Hall ...
Home of the Clark Telescope, the Lowell Observatory's mission is to pursue the study of astronomy, e...
This is the 13-inch telescope that Clyde Tombaugh used to discover the planet Pluto, while called a ...
Left to right: Solar Telescope, Remotely Controlled Telescope, 16" Telescope, 84" Telescope, 36" Tel...
University of Arizona Astronomer Aden B. Meinel, at right, adjusted Kitt Peak's first 16-inch telesc...
Photo shows Clyde Tombaugh and a 24-inch Cassegrain telescope on Magdalena Peak in Southern New Mexi...
Postcard depicting University of Arizona "A" Sentinel Peak - completed March 4, 1916. Actual size 70...
Portrait of Percival Lowell who was the founder of the Lowell Observatory in Flagstaff, Arizona. Mr....
Imprint varies: vol. II, Cambridge, The University Press; vol. III, n.p.Percival Lowell, director.I....
The three domes of the observatory visible, the ground around the observatory barrenThe three domes ...
Clyde Tombaugh holds the door open to the 13-inch telescope dome at the Lowell Observatory in Flagst...
The twin domes on the New Mexico State University Observatory on Tortugas Mountain. Tortugas Mountai...
Photo of Sun's Eye Arch, a natural window on the west side of Big Hogan mesa in Monument Valley, Ari...
Photograph of two domed buildings on a mountaintop; they contain telescopes that are part of the McD...
View of Old Main building roof on the University of Arizona campus located in Tucson (Ariz.)
The rear view of Walsh Hall with the domes of Ricard Observatory visibleThe rear view of Walsh Hall ...
Home of the Clark Telescope, the Lowell Observatory's mission is to pursue the study of astronomy, e...
This is the 13-inch telescope that Clyde Tombaugh used to discover the planet Pluto, while called a ...
Left to right: Solar Telescope, Remotely Controlled Telescope, 16" Telescope, 84" Telescope, 36" Tel...
University of Arizona Astronomer Aden B. Meinel, at right, adjusted Kitt Peak's first 16-inch telesc...
Photo shows Clyde Tombaugh and a 24-inch Cassegrain telescope on Magdalena Peak in Southern New Mexi...
Postcard depicting University of Arizona "A" Sentinel Peak - completed March 4, 1916. Actual size 70...
Portrait of Percival Lowell who was the founder of the Lowell Observatory in Flagstaff, Arizona. Mr....
Imprint varies: vol. II, Cambridge, The University Press; vol. III, n.p.Percival Lowell, director.I....
The three domes of the observatory visible, the ground around the observatory barrenThe three domes ...
Clyde Tombaugh holds the door open to the 13-inch telescope dome at the Lowell Observatory in Flagst...
The twin domes on the New Mexico State University Observatory on Tortugas Mountain. Tortugas Mountai...
Photo of Sun's Eye Arch, a natural window on the west side of Big Hogan mesa in Monument Valley, Ari...
Photograph of two domed buildings on a mountaintop; they contain telescopes that are part of the McD...
View of Old Main building roof on the University of Arizona campus located in Tucson (Ariz.)
The rear view of Walsh Hall with the domes of Ricard Observatory visibleThe rear view of Walsh Hall ...