Cryovolcanic Activity Creates Unique Structures »

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. The amount of material required to create the formations suggest its interior structure retained heat at some point in its history, enabling water-ice-rich materials to build up and resurface the region through cryovolcanic processes. The surface and atmospheric hazes of Pluto are shown here in greyscale, with an artistic interpretation of how past volcanic processes may have operated superimposed in blue.

Sputnik Planitia Studied »

The region studied 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.

Names proposed for two structures in the cryovolcanic region »

As part of their research, 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. The International Astronomical Union approved the names Coleman Mons and Ride Rupes in October 2021. Coleman Mons was key to understanding this region because it may be one of the most recently formed volcanic domes. Ride Rupes is one of the tallest and longest cliffs on Pluto and indicates there may be deep faulting in the area that could allow cryolava to flow up from the subsurface. The elevation values in this region range more than 8 kilometers (nearly 5 miles) from the highest areas in red/orange to the lowest areas in pink/white. For more information: http://pluto.jhuapl.edu/News-Center/News-Article.php?page=20211025