Browse Items (26 total)

Lowell, Percival, Mars Map, 1905, 1905

Percival Lowell's hand-drawn map of Mars, 1905

Lowell, Percival, Mars Map, 1896-1897, 1896-1897

Percival Lowell's hand-drawn map of Mars, 1896-1897

Sykes, Stanley, Stanley Sykes large sketchbook, Unknown

Large sketchbook owned by Stanley Sykes. This sketchbook includes drawings of places in Flagstaff, Arizona and unidentified photographs. Courtesy of…

Sykes, Stanley, Stanley Sykes small sketchbook, ca. 1950s

A small sketchbook owned by Stanley Sykes. This sketchbook features various landscape drawings of places in California. Sketchbook courtesy of Diana…

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