On the 95th anniversary of its discovery, Pluto remains one of the most beloved and enigmatic worlds in our solar system, ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Pluto is probably best known for being a demoted planet. In 2006, the International Astronomical Union stripped it of its ...

Pluto, and the man who discovered it, both demonstrate that labels such as “dwarf planet” and “amateur” really don’t tell us anything. Look past the label, and what you find beneath just ...

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

Astronomers believe they've uncovered the cause of Pluto's iconic icy heart, pointing to a violent cosmic collision in the ...

Trans-Neptunian objects (TNOs) are icy bodies that vary widely in size, from large dwarf planets like Pluto and Eris—each ...

On February 18, 2007, the Samjhauta Express train carrying hundreds of Indians and Pakistanis across the border was bombed by ...