Clyde Tombaugh

Clyde Tombaugh

Clyde Tombaugh at 13-inch Telescope Eyepiece

Clyde Tombaugh at a Zeiss Blink Comparator

Clyde Tombaugh at door of 13 inch Telescope

Young Clyde Tombaugh with his 9-inch telescope

City of Flagstaff Proclamation declaring March 13, 1980 "Lowell Observatory - Clyde Tombaugh Day"

Letter from V.M. Slipher to Roger Putnam mentioning that Clyde Tombaugh has found an interesting object on the 13-inch telescope plates

Original envelope for one of the Pluto discovery plates with Clyde Tombaugh's handwritten notes

Page from Clyde Tombaugh's observation logbook on the nights he took the Pluto discovery plates