On February 18, 1930, the American astronomer Clyde Tombaugh discovered Pluto! Before he discovered Pluto, another astronomer ...

It would be understandable if you stopped thinking as much about Pluto after it was “demoted” from being considered one of the nine planets sharing the Earth’s solar system to being classified as a ...

Pluto's discovery by Clyde Tombaugh, key political changes in Scandinavia and America, plus cultural and scientific milestones.

From 1905 until his death in 1916, Percival Lowell searched for a ninth planet, which he called Planet X. Lowell had predicted the planet based on irregularities in the orbit of Uranus. In 1929, ...

What NASA found on Pluto has raised serious questions. During a historic mission, NASA made a surprising discovery on the surface of Pluto. Scientists were not expecting this, and the discovery ...

Wednesday is "Pluto Day," because – yes, of course there is a day for that. And, while celebrating the celestial object that ...

February 18 holds a special place in history. Martin Luther's death in 1546 sparked the Protestant Reformation. Mark Twain's ...

FLAGSTAFF – Clyde Tombaugh sat in the Orpheum Theater that fateful night in February 1930, waiting for clouds to pass before the 24-year-old astronomer could return to Lowell Observatory to confirm ...

We classified Pluto before really understanding it—just like we reduce people to job titles or put names on relationships ...

Ammon News - On this day 1930, using a 13-inch (33-cm) telescope at the Lowell Observatory in Flagstaff, Arizona, Clyde W. Tombaugh, a 24-year-old American with no formal training in astronomy, ...