Lowell Observatory, Identification, Optimization, and Protection of Optical Telescope Sites, Part 4, 1986-05-22
Audio recording of a conference on the Identification, Optimization, and Protection of Optical Telescope Sites, Flagstaff, AZ, May 22-23, 1986
Lowell Observatory, Identification, Optimization, and Protection of Optical Telescope Sites, Part 5, 1986-05-23
Lowell Observatory, Identification, Optimization, and Protection of Optical Telescope Sites, Part 6, 1986-05-23
Lowell Observatory, Identification, Optimization, and Protection of Optical Telescope Sites, Part 7, 1986-05-23
Lowell Observatory, Identification, Optimization, and Protection of Optical Telescope Sites, Part 8, 1986-05-23
Tombaugh, Muron, Telegram to Clyde Tombaugh from his parents, 1930-03-14
Telegram to Clyde Tombaugh from his parents congratulating him the day after the announcement that he discovered a planet (Pluto)
Tags: Clyde Tombaugh, Pluto
Reaves, Gibson, W.H. Pickering, Milton Humason, and the Discovery of Pluto, 1983-07-22
"W.H. Pickering, Milton Humason, and the Discovery of Pluto." Talk given by Gibson Reaves at Lowell Observatory, July 22, 1983
United States Department of the Interior, Map of the Arizona Territory, 1892, 1892
Map of the Arizona Territory used by Andrew Douglass on his trip to find a site for Percival Lowell's observatory in 1894. Douglass' handwritten notes…
Lowell Observatory, Lowell Observatory Visitor Guestbook, 1894-1938, 1894 - 1938
Lowell Observatory visitor guestbook from 1894 to 1938. Notable signatures include astronomers Edward Emerson Barnard, Bart Bok, William Wallace…
Lowell Observatory, Lowell Observatory Brochure, 1990 circa
A Lowell Observatory brochure from circa 1990.
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