penitentes tagged posts

1. Pluto’s bladed terrain as seen from New Horizons during its July 2015 flyby. Credits: NASA/JHUAPL/SwRI 2. An example of the penitentes from the southern end of the Chajnantor plain in Chile. Though these ice formations only reach a few feet in height, while Pluto’s bladed terrain reaches hundreds of feet, they both have similar sharp ridges. Credits: Wikimedia Commons/ESO

NASA’s New Horizons mission revolutionized our knowledge of Pluto when it flew past that distant world in July 2015. Among its many discoveries were images of strange formations resembling giant knife blades of ice, whose origin had remained a mystery...

Photo Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

Using a model similar to what meteorologists use to forecast weather on Earth and a computer simulation of the physics of evaporating ices, a new study has found evidence that snow and ice features previously only seen on Earth, have been spotted on Pluto. “Penitentes” which are formed by erosion, are bowl-shaped depressions with spires around the edge, and are several metres high.

The groundbreaking research, done in collaboration with researchers at NASA and Johns Hopkins University, indicates that these icy features may exist on other planets where environmental conditions are similar...