(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague?

“Sputnik Planitia may be as important for Pluto’s climate as the ocean is for Earth’s climate,” explained Bertrand. “If you remove Sputnik Planitia – if you remove the heart of Pluto ...

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 ...

I am a Pluto climate scientist! I investigate how Pluto's climate and atmosphere are coupled to its surface ices and how they have varied with time over the age of the solar system. I use numerical ...

Pluto was the little planet that could — until it couldn’t. Discovered in 1930 at Lowell Observatory in Flagstaff, Arizona, Pluto was hailed as the ninth planet in our solar system. For ...

From reproductive rights to climate change to Big Tech ... NASA for the first time have been able to observe the make up of Pluto and other small and icy celestial bodies in the outer solar ...

An amateur astronomer discovered Pluto 95 years ago today. The former planet will complete an orbit in another 153 years. On February 18, 1930, just two weeks after his 24th birthday, Clyde ...

Pluto was discovered 95 years ago on Feb. 18, and even though it was demoted nearly two decades ago, it remains a fascinating part of our solar system. "Pluto is a complex and mysterious world ...