The head of NASA says maybe Pluto is a planet after all. He is wrong because Pluto is part of the rest of the solar system ...

Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for being a planet, putting Pluto into the new category of dwarf planet ...

Is Pluto a planet? NASA Administrator Jared Isaacman told Congress on Tuesday that Pluto should be recognized as a planet, 20 years after its status changed.

NASA chief Jared Isaacman said at a US Senate hearing that he supports restoring Pluto's status as a planet after a controversial 2006 demotion.

NASA Administrator Jared Isaacman wants to put an end to a decades-long debate among scientists. Is Pluto a planet or not? Isaacman says it should be — but it hasn’t been one for 20 years. That’s ...

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 ...

Pluto was downgraded from a planet to a dwarf planet in 2006 by the International Astronomical Union. The main reason for Pluto's demotion is that it's not able to "clear its orbit of debris." Other ...

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 ...