'Weird Object' Discovered Beyond Neptune: A Clue in the Quest for Planet Nine?

The newly discovered object called Niku is a real oddity (artist's conception). It is also part of a group of many such objects far past Neptune in the outer Solar System. Image Credit: ESO/L. Calçada/Nick Risinger

The newly discovered object called Niku is a real oddity (artist’s conception). It is also part of a group of many such objects far past Neptune in the outer Solar System. Image Credit: ESO/L. Calçada/Nick Risinger

For the most part, the Solar System seems to be a rather well-ordered place; the planets, dwarf planets, […]

Does Pluto Have a Subsurface Ocean? New Research Says Probably

The discovery of huge faults on Pluto provides evidence for a possible liquid water ocean beneath the ice crust. Image Credit: NASA/JHUAPL/SwRI

The discovery of huge faults on Pluto provides evidence for a possible liquid water ocean beneath the ice crust. Photo Credit: NASA/JHUAPL/SwRI

So-called “waterworlds” have been found to be surprisingly common in the Solar System—small icy moons which have ice crusts but oceans of liquid water below the surface. These include Jupiter’s moons Europa and […]

New Horizons Obtains New Images and Science Data of Post-Pluto Kuiper Belt Object

Image from New Horizons showing the small KBO called 1994 JR1, taken in April 2016. Credits: NASA/JHUAPL/SwRI

Image from New Horizons showing the small KBO called 1994 JR1, taken in April 2016. Image Credit: NASA/JHUAPL/SwRI

The New Horizons mission to Pluto has been nothing less than incredible, giving us our first close-up views of this enigmatic dwarf planet and its moons. But the show isn’t over yet, as the New Horizons […]

New 'KEM' Proposal Would Extend New Horizons Post-Pluto Mission to 2021

If approved by NASA, the KEM proposal will allow New Horizons to continue its study of the outer fringes of the Solar System until 2021, including a flyby of 2014 MU69. Image Credit: NASA/JHUAPL/SwRI

If approved by NASA, the KEM proposal will allow New Horizons to continue its study of the outer fringes of the Solar System until 2021, including a flyby of 2014 MU69. Image Credit: NASA/JHUAPL/SwRI

The New Horizons mission has revolutionized our understanding of Pluto and its moons, after conducting the first-ever flyby last summer. […]

Pluto Once Had Rivers and Lakes of Liquid Nitrogen, New Horizons Data Suggests

Artist's conception of Pluto's surface, with the distant Sun and largest moon Charon in the sky. The surface is frozen now, but evidence suggests that rivers and lakes of liquid nitrogen once flowed here. Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker

Artist’s conception of Pluto’s surface, with the distant Sun and largest moon Charon in the sky. The surface is frozen now, but evidence suggests that rivers and lakes of liquid nitrogen once flowed here. Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker

As has been discussed extensively now on AmericaSpace, New […]

Pluto Revealed: Five New Science Papers Highlight Discoveries by New Horizons

High-resolution view of Pluto from New Horizons. The large smoother area of ice is the western lobe of the “heart” feature. Image Credit: NASA/JHUAPL/SwRI

High-resolution view of Pluto from New Horizons. The large smoother area of ice in Sputnik Planum is the western lobe of the “heart” feature. Image Credit: NASA/JHUAPL/SwRI

Pluto is a tiny world in the outer fringes of the Solar System; for many decades it was only a mere speck of light in even the […]

New Horizons Discovers Methane 'Snow' on Pluto's Mountain Peaks

Methane "snow" on mountain peaks in the Cthulhu region of Pluto. The image covers an area 280 miles (450 kilometers) long by 140 miles (225 kilometers) wide. Image Credit: NASA/JHUAPL/SwRI

Methane “snow” on mountain peaks in the Cthulhu region of Pluto. The enhanced color version of the inset image is on the left and the false color version is on the right. The image covers an area 280 miles (450 kilometers) long by 140 miles (225 kilometers) wide. Image Credit: NASA/JHUAPL/SwRI

As the data […]

New Horizons Finds Evidence for Frozen Ocean Inside Pluto's Moon Charon

The canyons of Charon. Image Credit: NASA/JHUAPL/SwRI

The canyons of Charon, some of which dwarf the Grand Canyon on Earth. Image Credit: NASA/JHUAPL/SwRI

One of the most surprising discoveries in recent years in the outer Solar System is that there are small moons which have oceans inside them. Jupiter’s moon Europa and Saturn’s moon Enceladus are now known to have global […]

The 'Floating Hills' of Pluto: Icebergs In a Frozen Nitrogen Sea

Icebergs on Pluto: the large blocks of water ice float in a "sea" of nitrogen ice and are thought to have broken off from the rugged and mountainous highlands. Image Credit: NASA/JHUAPL/SwRI

Icebergs on Pluto: The large blocks of water ice float in a “sea” of nitrogen ice and are thought to have broken off from the rugged and mountainous highlands. Image Credit: NASA/JHUAPL/SwRI

Pluto is a tiny world and incredibly distant from the Sun, so it was a pleasant surprise for scientists last summer when […]

Is 'Planet 9' Really a Second Massive Kuiper Belt?

The Kupier Belt is a massive collection of dwarf planet and asteroid-sized worlds orbiting far past Neptune. Is the hypothetical Planet 9 really a second such belt? Image Credit: T. Pyle (SSC)/JPL-Caltech/NASA

The Kuiper Belt is a massive collection of dwarf planet- and asteroid-sized worlds orbiting far past Neptune. Is the hypothetical Planet 9 really a second such belt? Image Credit: T. Pyle (SSC)/JPL-Caltech/NASA

The announcement of a possible large ninth planet in our Solar System way beyond Neptune last month caused a lot of excitement, […]