Pluto, once considered the ninth planet, was reclassified as a dwarf planet in 2006 because it shares its orbital path with ...

Poor Pluto. On August 24, 2006 at the International Astronomy Union (IAU) General Assembly the ninth planet was scrubbed only 76 years after its discovery. Even weirder is that it actually got voted ...

Things have been a mess since Pluto's demotion. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. In 2006, the International Astronomical Union ...

It's a question that has sparked debate across the world. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Textbooks had to be rewritten. Members ...

A team of scientists wants Pluto classified as a planet again — along with dozens of similar bodies in the solar system and any found around distant stars. The call goes against a controversial ...

When NASA’s New Horizons spacecraft zipped past Pluto in 2015, it showed a world that was much more dynamic than anyone had imagined. The dwarf planet hosts icy nitrogen cliffs that resemble the ...

NASA's New Horizons spacecraft successfully executed its pioneering 2015 flyby of Pluto, despite a critical software anomaly three days prior that necessitated a 76-hour, real-time command and data ...

In 2006, astronomers gathered in Prague to consider a very basic question: How many planets are in our solar system? Was it nine, or was it actually eight, or perhaps as many as 12? By the end of the ...

“This is definitely an extraordinary system,” Cathy Olkin, New Horizons Deputy Project Scientist, told NOVA Next on Tuesday. Pluto is a celestial oddball in more ways than one. It’s the only (former) ...