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Formations found on Pluto not yet seen in solar system, giant ice volcanoes hint at possible life

Pluto ice water spots
Posted at 6:22 PM, Mar 31, 2022

Images of Pluto captured by NASA's New Horizons mission while on a flyby of the dwarf planet in July 2015 are still yielding new previously unheard-of details and insights about Pluto and its moons.

In 2006 the celestial body was given dwarf planet status by the International Astronomical Union which developed a new definition for planets to which Pluto did not fit. A new analysis of the photos taken on that 2015 mission shows a region on the planet that is bumpy and doesn't appear to resemble other parts of the small dwarf planet.

New Horizons mission scientists have determined that cryovolcanic activity most likely created unique structures on Pluto not yet seen anywhere else in the solar system. (

Researchers said in their analysis that the region on Pluto is located southwest of Pluto's "heart" and called "Sputnik Planiti." It contains "multiple large domes" and the area rises up about 4 miles tall and is about 18 - 60 miles wide with "interconnected hills" and mounds along with depressions that cover the sides and tops of many of the formations and structures.

The region lies southwest of Pluto's "heart," Sputnik Planitia, and contains multiple large domes and rises up to 7 kilometers (about 4 miles) tall and 30 to 100 kilometers (18 to 60 miles) across, with interconnected hills, mounds, and depressions covering the sides and tops of many of the larger structures. (

Kelsi Singer, senior research scientist at the Southwest Research Institute, which is located in Boulder, Colorado said, "We found a field of very large icy volcanoes that look nothing like anything else we have seen in the solar system." 

Volcanic domes on the dwarf planet were studied and the two largest are called Wright Mons and Piccard Mons. Researchers say Wright Mons was determined to be similarin volume to the Mauna Loa volcano in Hawaii, which is one of the largest on Earth.

Kelsi Singer of the Southwest Research Institute and the New Horizons team proposed the names for two structures in the cryovolcanic region honoring aviation pioneers Bessie Coleman, the first African American and Native American woman to earn a pilot's license, and Sally Ride, the first American woman in space. (

Singer said, "The way these features look is very different than any volcanoes across the solar system, either icy examples or rocky volcanoes."

"They formed as mountains, but there is no caldera at the top, and they have large bumps all over them," she said. "This means Pluto has more internal heat than we thought it would, which means we don't fully understand how planetary bodies work." 

The researchers believe the ice volcanoes were formed in multiple different eras or "episodes" and were probably active about 100 million to 200 million years ago, which is considered young in geology.