Join Donate

The Bruce Murray Space Image Library

The Instrument that Discovered a Planet

The Instrument that Discovered a Planet

Click to view full image

Pretzelpaws via Wikimedia Commons

The Instrument that Discovered a Planet
The blink comparator used by Clyde Tombaugh in the discovery of Pluto. Tombaugh went on to scan millions of stars with this comparator during the 1930s.

Original image.

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. For uses not allowed by that license, contact us to request publication permission from the copyright holder

Original image data dated on or about August 10, 2005

Explore related images: trans-neptunian objects, Pluto, pretty pictures, history, dwarf planets beyond Neptune

Comments & Sharing
More Images
astronaut on Phobos
Let's Change the World

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Today

Bruce Murray and Carl Sagan
Pretty Pictures

Support the Bruce Murray Space Image Library and help us share the wonders of other worlds.

Donate