"The data from the termination shock encounter will be a treasure trove for space physicists worldwide who are eager to ...

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

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

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 ...

To get somewhere in outer space, you can’t exactly drive in a straight line. Orbits are tricky things, and sending a probe to ...

Many astronomy enthusiasts know of Alan Stern, the Principal Investigator of the New Horizons spacecraft mission that conducted a flyby of the Pluto system in 2015. Stern is an outspoken critic of ...

Pluto was identified in 1930, but by 1994, it was still little more than a blurry pixelated smudge on astronomers’ screens. Today, we marvel at its icy plains, towering mountains, and stunningly ...

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute NASA's New Horizons spacecraft conducted the first and only flyby of the Pluto system, culminating at ...

NASA sent its probe New Horizons on a flyby in 2015. It confirmed the tiny planet harbored an ocean beneath its thick, icy shell. Pluto was always in a tough spot when it came to being a planet.