PLUTO

Most scientists assume that Sputnik Planitia — the wide plane in the western lobe of Pluto's "heart" — is an impact basin. A new study argues otherwise.

According to a new study, Sputnik Planitia — a wide plane in the western lobe of Pluto's "heart" — may have a cold, slushy ocean of water-ice.

NASA's New Horizons spacecraft has completed sending over the last bit of information from its 2015 flyby of Pluto.

New Horizons will rendezvous with 2014 MU69 — a 20 to 30 mile wide object located roughly a billion miles from Pluto.

2014 UZ224 is roughly 8.5 billion miles from the sun and completes one orbit in 1,100 Earth years.

According to a new study, nitrogen ice played a major role in the creation of Pluto's heart-shaped Tombaugh Regio.

Two new studies, based on data collected by NASA’s Chandra X-ray Observatory and the New Horizons spacecraft, shed new light on Pluto and its largest moon Charon.

Planet nine could really ruin what we thought were the plans for some of our outer planets.

The Solar and Heliospheric Observatory saw a bright comet, which would usually whip around the sun, get torn apart and vaporized.

The invaluable trove of data that the spacecraft has sent back to Earth is contributing greatly to our understanding of planetary science.

The spacecraft, which provided the first close-up pictures of the former planet, will head deeper into the Kuiper Belt to explore an object which hadn’t been discovered when it launched.

The dwarf planet's expansion may be due to a slowly freezing ocean.

The image, captured by the spacecraft during its July flyby, shows the southeastern portion of Pluto’s great ice plains bordering dark highlands.

Pluto may no longer be defined as a planet but it has never been more popular.

The potential discovery of a new planet provides further evidence Pluto is, and always will be, a dwarf planet.

The picture is part of a sequence taken near New Horizons’ closest approach to Pluto, with resolutions of about 250-280 feet per pixel.

Though Pluto has been downsized to a dwarf planet, the U.S Postal Service will commemorate it in 2016.

New Horizons' unprecedented images of Pluto in July were among this year's highlights.

In addition to showing undulating streams of solar winds, the visualization also depicts the faster, and much more erratic, coronal mass ejections.

It's Walt Disney's 114th birthday and he's had plenty of impact on modern entertainment.

The New Horizons spacecraft conducted a flyby in July of the dwarf planet.