Browse Items (71 total)

Hewitt, Anthony., Charon Discovery Images, ca. 1978

Discovery images of Pluto's moon, Charon, captured by astronomer Anthony Hewitt. The images were then sent to astronomer Jim Christy for further…

Tombaugh, Muron and Adella., Congratulatory Telegram from Clyde Tombaugh's Parents, 1930-03-14

A telegram from Clyde Tombaugh's parents congratulating their son on his discovery of Planet X.

Gill, Thomas B., 1915 Pluto Plates, ca. 1915

Plates taken in 1915 by Thomas Gill at Lowell Observatory. Unbeknownst to Gill, these plates contained images of Pluto. The team that discovered…

Unknown., Clyde Tombaugh at door of 13 in. Telescope, Unknown.

Photograph of Clyde Tombaugh at the entryway of the 13 inch telescope. Tombaugh captured images using this telescope on January 23rd and 29th in 1930…

Unknown., Newspaper clipping referring to Pluto as "The Baby in the Family" of the solar system, ca. 1930s

This newspaper clipping from an unknown publication refers to Pluto as "the Baby in the Family" of the solar system, which reflects a fondness that…

Unknown., Gill at Brashear Lens- Swathmore Telescope, July 13, 1916., 1916-07-13

Photograph of Thomas Gill at the Brashear Lens of the Swathmore Telescope in 1916. Gill was involved in the first phase of the search for Planet X…

Unknown., Photograph of Roger Lowell Putnam, Unknown.

Photograph of Percival Lowell's nephew, Roger Lowell Putnam, who served as sole trustee of the observatory following his uncle's passing. Putnam…

Unknown., C. O. Lampland & V. M. Slipher at 24 inch telescope, Unknown.

Carl O. Lampland and V.M. Slipher pictured at the 24 inch telescope at Lowell Observatory. Both Lampland and Slipher were instrumental in the search…

McClain, Jerry., Completed dome for the 13 inch telescope used to discover Pluto, Unknown.

A photograph of the completed dome for the 13 inch telescope used to search for Planet X i.e. Pluto. The dome was completed in September of 1928.

Unknown, Construction of the dome for the 13 inch telescope used to discover Pluto, ca. 1928

Photograph of the construction of a dome for the 13 inch telescope used to search for Planet X i.e. Pluto. The construction began in March of 1928…