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

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.

President Donald Trump and his NASA administrator are reviving the Pluto debate again — apparently at the urging of “Star ...

NASA administrator Jared Isaacman just urged the president to ‘make Pluto great again’—but Trump doesn’t have the power to do ...

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

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

No longer a planet but not forgotten, Pluto’s colors, captured by NASA almost 10 years ago, continue to dazzle among the collection of colorful celestial objects only seen in the solar system. Since ...

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 ...

Pluto, discovered in 1930, was once considered the ninth planet in our solar system. In 2006, the International Astronomical Union reclassified Pluto as a dwarf planet because it doesn't meet all the ...

Pluto is the most well-known dwarf planet. NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute . Out beyond Neptune, past Pluto, through the chaos of the Kuiper ...

The latest images of Pluto, computer reconstructions of multiple images taken by the Hubble Space Telescope, show a mottled surface of charcoal, deep orange and white that changes more dramatically ...