A new model that incorporates data gathered by the JWST could help scientists understand the composition and mass of objects ...

Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

Why was Pluto reclassified as a dwarf planet? One might think that it’s purely a matter of size. Mercury, the smallest of the ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

Being heartbroken for 2 months fades in comparison to Pluto’s heart that has been broken for billions of years! Pluto’s mesmerizing heart was captured for the first time in 2015 by NASA’s ...

Neither one is “big.” Earth’s moon is 2,160 miles in diameter. Some scientists believe Pluto should be upheld, but others suggest that Pluto, UB313 and other icy denizens of the Kuiper Belt ...

And so on May 1, Lowell Observatory announced that Planet X would be named Pluto. But with its peculiar, tilted orbit and confoundingly small size, the world remained an enigma. Over the years the ...

Far from being flat and boring, Pluto seemed to be full of mountains, plains and maybe even "snow". By measuring the size of the shadows, we could estimate the height of these peaks at over 4,000m ...

Factors that distinguish Pluto from the terrestrial and Jovian planets include its composition (ice, rock, and frozen gases), changing atmosphere, small size, comparatively large moon, and its ...

Pluto was discovered at Lowell Observatory in Flagstaff, Arizona in 1930 and was considered our ninth planet until 2006. The International Astronomical Union reclassified Pluto as a dwarf planet ...