February 18 marks the discovery of Pluto by astronomer Clyde W. Tombaugh. The discovery reshaped the understanding of the ...

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 ...

Here's what to know about the brief tenure of our solar system's smallest planet.

(Enhanced color global view of Pluto, taken when NASA’s New Horizons spacecraft was 280,000 miles (450,000 kilometers) away. Credit: NASA.) Nearly a century ago, a young amateur astronomer from humble ...

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, ...

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

Pluto was supposed to be a frozen, lifeless relic drifting at the edge of the solar system. But when NASA’s New Horizons probe finally arrived, it found something far stranger. Beneath the nitrogen ...