Using NASA New Horizons spacecraft data and digital elevation models of Pluto and its largest moon Charon, mission scientists ...

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

Summer 2015 was marked by a unique astronomical event, which occurs approximately once in ... the history of astronomy. The ...

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

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

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

Whether Pluto is officially a planet is the least interesting thing about the runt of the solar system, astronomers will tell you 95 years after the discovery of the fascinating and sometimes ...

Why is Pluto no longer a planet? Discover the real reason behind Pluto’s reclassification as a dwarf planet and the science that led to this change.

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

NASA’s New Horizons mission changed our understanding of the outer solar system. After its famous Pluto flyby, it traveled ...

In 2006, the same year that Pluto lost its planetary status, NASA launched New Horizons, a spacecraft aimed at exploring Pluto. A small portion of Tombaugh’s ashes flew aboard New Horizons as it ...

One of the most vocal critics of Pluto’s demotion was Alan Stern, the principal investigator of NASA’s New Horizons mission, which explored Pluto in 2015. Stern argued that even Earth hasn’t ...