The reclassification of Pluto as a dwarf planet continues to stir up a hornet's nest of controversy and debate, as Space.com meets one astronomer who believes the decision to have been a mistake.

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

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

Add Yahoo as a preferred source to see more of our stories on Google. Guests visting the Lowell Observatory in Flagstaff, Arizona during the I Heart Pluto Festival gaze at celestial objects from the ...

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 ...

Since it was stripped of planetary status, Pluto’s defenders have been fighting the decision – and they’re only getting more passionate ...

This story is part of Short Wave's series Space Camp about all the weird, wonderful things happening in the universe. Check out the rest of the series. If you were born in the last century you might ...

Pluto was downgraded from a planet to a dwarf planet in 2006 by the International Astronomical Union. NASA Administrator Jared Isaacman has stated his support for President Trump to take action to ...

Twenty years ago Pluto lost its planethood, and I’m partially to blame. “Blame” is a strange word to use for what seems like a matter of mere semantics; after all, Pluto exists as an intriguing world ...

Twenty years after Pluto was reclassified as a dwarf planet, Caltech astronomer Mike Brown, whose discovery of Eris helped prompt the 2006 debate, continues to defend the decision. In a Scientific ...

Pluto hasn't been a planet for almost 20 years. In the early 2000s, scientists discovered several objects of a similar size to Pluto. So, during the summer of 2006, members of the International ...