Browse Items (41 total)

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

Tombaugh, Clyde W., Credit for the discovery of Pluto The Martian Polar Cap "Carbonic Acid" hypothesis Letter from Clyde Tombaugh to Carl Lampland, November 1, 1932, 1932-11-01

Professor Baker's book and credit for the discovery of Pluto. Rock salt crystals for prism purposes. Dry ice, Martian polar caps, carbon dioxide…

Tags: Astronomy, Pluto

Tombaugh, Clyde W., Credit for the discovery of Pluto Letter from Clyde Tombaugh to Carl Lampland, October 18, 1932, 1932-10-18

Problem with the treatment of the discovery of Pluto in Professor Baker's new book on Astronomy wherein Tombaugh's name is not mentioned as the…

Tags: Pluto

Stokely, J., Discovery of Pluto Letter from James Stokley to Carl Lampland, August 11, 1930, 1930-08-11

All reports indicate "that you have made a real planetary discovery"

Latest issue of 'The Observatory' containing Dr. Crommelin's reports to the…

Tags: Pluto

Stokely, J., Discovery of Pluto Letter from James Stokley (Science Services, Inc.) to Carl Lampland, July 29, 1930, 1930-07-29

Stokely's airplane photograph of Meteor Crater

Status of the Pluto situation

Request for copies of leaflet and announcement issued on Pluto's…

Tags: Pluto

NASA/JHUAPL/SwRI, Pluto, 2015-07-14

NASA’s New Horizons spacecraft captured this high-resolution enhanced color view of Pluto on July 14, 2015. The image combines blue, red and infrared…

Tags: New Horizons, Pluto

Lundin, C.A. Robert, Discovery of Pluto Letter from C.A. Robert Lundin to Carl Lampland, April 14, 1930, 1930-04-14

C.A. Robert Lundin now associated with Roland W. Sellow who designs and builds mountings, domes, rising floors, observatory buildings; Discovery of…

Tags: Pluto

Lowell, Constance S., Discovery of Pluto Lowell Prize at the Normal School (Northern Arizona University) Letter from Constance Lowell (Mrs. Percival) to Carl Lampland, March 9, 1930, 1930-03-09

Roger Putnam has written Mrs. Lowell about the observation of what may be Planet X and if she has any thoughts about the naming thereof.

Plans for…

Tags: Lowell, Pluto

Lampland, Carl O., Discovery of Pluto Letter from Carl Lampland to C.A. Robert Lundin, April 19, 1930, 1930-04-19

Request for photograph of the mount for the 13-inch; Observing, measurements of positions and calculations have been consuming every waking moment for…

Tags: Pluto

Lampland, Carl O., Discovery of Pluto Letter from Carl Lampland to C.A. Robert Lundin (The Alvan Clark & Sons Corp.), March 25, 1930, 1930-03-25

C.A. Robert Lundin's part in the discovery of Pluto

Tags: Pluto