 Lowell Observatory file, circa 1950 |
Astronomer Clyde Tombaugh demonstrates how he used a device known as a blink comparator to discover Pluto at the Lowell Observatory in Arizona on Feb. 18, 1930. |
Astronomers had their doubts about Pluto from the very start. At first, even its discoverer wasn’t sure where the little world fit in the planetary parade. But 80 years after it was found, Pluto has demonstrated that it’s a survivor.
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