On August 24, 2006, in Prague, members of the International Astronomical Union gathered for the final day of their General ...

Add Yahoo as a preferred source to see more of our stories on Google. NASA chief Jared Isaacman has doubled down on his stance that Pluto is without a doubt a planet. For two decades, controversy has ...

Twenty years after Pluto became a dwarf planet, people are still fighting over its status. Experts explain why the debate feels so personal.

Pluto was once the ninth planet of our Solar System, but on August 24, 2006, that changed. The International Astronomical Union reclassified Pluto as a dwarf planet after introducing a new definition ...

For decades, scientists and the general public have argued over the astronomical status of beloved dwarf planet Pluto. In the latest salvo, NASA Administrator Jared Isaacman said that he was “very ...

Twenty years after Pluto lost its planetary status, the debate continues as scientists still disagree over what defines a planet.

NASA chief Jared Isaacman rekindled a now two-decade-long controversy when he pushed to reinstate Pluto as a planet before the U.S. Senate. Stripped of its planethood in 2006, Pluto's planet status ...

Since it was stripped of planetary status, Pluto’s defenders have been fighting the decision – and they’re only getting more passionate Twenty years ago, Pluto got demoted. After a vote by the ...

For 76 years, generations of students learned that our solar system had nine planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. Now, in 2026, some still can't get over ...