Pluto, once considered the ninth and most distant planet from the sun, is now the largest known dwarf planet in the solar system. It is also one of the largest known members of the Kuiper Belt, a shadowy zone beyond the orbit of Neptune thought to be populated by hundreds of thousands of rocky, icy bodies each larger than 62 miles (100 kilometers) across, along with 1 trillion or more comets.
Since NASA's Cassini spacecraft has ended its epic 13-year stint at Saturn, here's a look at some other missions en route to new destinations or slated to launch in the next few years.
Pluto's surface hosts blades of ice that soar to the height of skyscrapers — and researchers have narrowed down exactly how the dramatic features form.
NASA's New Horizons spacecraft is zooming through the outer solar system with its eyes open once again.
Guitarist Tommy Shaw of the legendary rock band Styx dedicates a song to Saturn's Cassini spacecraft in a new video.
NASA's New Horizons spacecraft will get three times closer to its next flyby target than it got to Pluto back in July 2015, if all goes according to plan.
NASA's New Horizons spacecraft may double its pleasure during its next deep-space flyby 16 months from now.
On the two-year anniversary of the New Horizons probe's flyby of Pluto, mission scientists unveiled two detailed global maps of the dwarf planet and its largest moon, Charon.
You can relive New Horizons' epic Pluto flyby, thanks to two amazing videos NASA released Friday (July 14), the two-year anniversary of the landmark event.
On July 14, 2015, NASA's New Horizons spacecraft zoomed within 7,800 miles (12,550 kilometers) of Pluto, capturing the first-ever up-close looks at the dwarf planet system.
The frigid, faraway body that NASA's New Horizons spacecraft will zoom by 18 months from now may actually be a cluster of small objects, new observations suggest.
The team behind the New Horizons mission to Pluto recently pulled of a challenging observation of the spacecraft's next target, MU69, as the object eclipsed a distant star.
Fusion-powered rockets that are only the size of a few refrigerators could one day help propel spacecraft at high speeds to nearby planets or even other stars, a NASA-funded spaceflight company says.
New Horizons team members have traveled to Argentina and South Africa to watch the Kuiper Belt object 2014 MU69 — the mission's next flyby target — pass in front of a distant star.
The dwarf planet 2007 OR10, informally known as "Snow White," has a moon that's between 150 miles and 250 miles (240 to 400 kilometers) wide, a new study reveals.
Some scientists believe Pluto's red "whale"-shaped region is the mark of a giant impact — the same one that produced Pluto's huge moon Charon.