February 18 marks the discovery of Pluto by astronomer Clyde W. Tombaugh. The discovery reshaped the understanding of the solar system, as Pluto was long considered ...

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

On 2/18/1930, American astronomer Clyde Tombaugh discovered Pluto. We celebrate the plucky dwarf planet with a scale model replica of the solar system in Maine.

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

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

Clyde Tombaugh, who was born on this day in 1906, grew up on a farm in Kansas and was captivated by sights of the moon and ...

Mercury is the smallest planet in our solar system. Explore its size, extreme temperatures, core structure, and comparison ...

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

On Feb. 18, 2001, auto racing star Dale Earnhardt Sr. died in a crash in the final lap of the Daytona 500; he was 49. In 1885 ...

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its ...

On Feb. 18, 1979, snow fell in the Sahara Desert in southern Algeria for the first known time. It fell a second time in 2016 and a third time in 2018.

Today is Wednesday, Feb. 18, the 49th day of 2026. There are 316 days left in the year. Today in history: In 2001, auto racing star Dale Earnhardt Sr. died in a crash in the final lap of the Daytona ...