Pluto lost its planetary status in 2006. Nearly two decades later, people are still arguing about it — and now the argument has reached the White House. NASA Administrator Jared Isaacman told the ...

Debate has raged for two decades over whether Pluto should be considered a planet. Some want President Trump to take action via executive order.

Discovered in 1930 at the Lowell Observatory, Pluto was demoted as a planet in 2006. Some want President Trump to take action ...

A long-settled space debate is back in the spotlight after fresh political backing in the United States. Calls to restore Pluto’s status are gaining attention from both scientists and public figures.

Scientists reported Wednesday they finally have "good evidence" of Planet X, a true ninth planet on the fringes of our solar system. The gas giant is thought to be almost as big as Neptune and ...

Want to work for NASA from the comforts of your couch? The space agency is looking to fulfill an amateur astronomer's dream — credit for the discovery of a new planet. NASA is looking for help to find ...