As astronomers continue discovering unusual worlds beyond our solar system, many say the question that divided scientists in ...

A 24-year-old observatory assistant from the Midwest discovered Pluto. Clyde Tombaugh, born in 1906 in Streator, Illinois, grew up fascinated with the solar system. A self-taught astronomer, he built ...

The discovery of the Kuiper Belt revealed thousands of icy objects near Pluto, challenging its status as a planet. After the discovery of Eris, astronomers formally redefined “planet” in 2006, leading ...

On the 20th anniversary of Pluto’s infamous demotion, Mike “Pluto Killer” Brown explains why any reversal of that decision would be driven more by nostalgia than science ...

Unpopular opinion time, Pluto being reclassified as a dwarf planet was a great thing for our understanding of the solar system and for the former planet, too.

Those who supported Pluto’s demotion included Neil DeGrasse Tyson ...

Pluto lost its planethood for a very specific reason. Whether or not that’s a good reason depends on who you ask.

The NFL and Disney teamed up, and the Browns picked Pluto. On Fanatics you'll find an oatmeal color shirt with Pluto's face ...

Scientists continue to disagree over how worlds in the solar system should be classified. The argument turns on whether ...

Those who supported Pluto’s demotion included Neil DeGrasse Tyson NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute Image 20 years ago, news broke that Pluto had ...

NASA chief Jared Isaacman has doubled down on his stance that Pluto is without a doubt a planet. For two decades, controversy has surrounded the distant icy world after it was infamously stripped of ...