NASA chief Jared Issacman appears to be among those who support Pluto being reclassified as a planet. Could President Trump ...

Pluto was reclassified as a dwarf planet in 2006. This video explains the scientific reasoning behind its demotion, the IAU’s strict criteria for planet status, and why Pluto remains fascinating ...

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 ...

For no explainable practical reason, humans are enamored with – and even empathetic toward – specific inanimate objects. Our first car. A choice coffee mug. And for a particular subset of the ...

President Donald Trump campaigned on "America first," but some of his supporters and appointees apparently want Pluto to once again be ... ninth. The ninth planet in our solar system, that is. Ever ...