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

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

First detected in 2004, the dwarf planetHaumeaquickly stood out due to its rapid rotation and elongated form. But the 2017 discovery of a ring system around it added a new level of complexity to an ...

The renewed push is stirring controversy nearly two decades after the dwarf planet classification was introduced. Renewed debate NASA chief Jared Isaacman has voiced support for reclassifying Pluto as ...

Astronomers have discovered a unique molten planet, L 98-59 d, orbiting the red dwarf star in the Volans constellation. It features a perpetual ocean of magma and a sulfur-rich atmosphere, making it a ...