On Aug. 24, 2006, the International Astronomical Union (IAU) decided that Pluto wasn't a planet anymore. Instead, Pluto is ...

In Roman mythology, Pluto is the god and ruler of the dead. For a return mission to the dwarf planet, Howett and her ...

Pluto, once considered the ninth planet of our solar system, has been a topic of intrigue since its reclassification as a ...

With a diameter of 1,440 miles, Pluto is farthest from the sun. While major planets make roughly circular orbits, Pluto ...

Based on measurements from NASA's New Horizons spacecraft, which hurtled past Pluto and Charon in 2015, planetary scientist Will Grundy at the Lowell Observatory in Arizona calculated that Pluto's ...

New data from the James Webb telescope reveals that Pluto's strange atmospheric haze controls its climate, surprising scientists.

The New Horizons spacecraft sends back its sensational snapshots of Jupiter, and its volcanic moon Io, before the mission's close encounter with Pluto (Photo by: Photo12/Universal Images Group via ...

On Episode 173 of This Week In Space, Rod Pyle and and Tariq Malik look back at the week in space news.

The space probe began making discoveries even before today's flyby. — -- Three billion miles and nearly ten years of travel led up to the moment NASA's New Horizons probe zoomed past Pluto ...

In 2005, this image from NASA's Hubble Space Telescope was used to identify two new moons orbiting Pluto (Nix and Hydra), to the right of Charon.

“The SDC is the only dust instrument that has ever measured the outer reaches of our solar system.” After soaring by Pluto in 2015, the spacecraft pressed deeper into a region of the solar system ...