New research showcasing the dramatic topography of Pluto and its moon Charon should help scientists better guess what forces have shaped them.
The New Horizons spacecraft flew past the two bodies almost three years ago, but scientists are still exploring the wealth of data the mission produced. In the case of the new maps, that means stitching together images taken by a pair of cameras
"This was one of the most complex yet most exciting planetary mapping projects I've had the pleasure to be involved with," Paul Schenk, a planetary geologist at Universities Space Research Association's Lunar and Planetary Institute in Texas, said in a statement. "Every time new images came down, something new would be revealed."
The mapping project shows off the dramatic topography of both bodies and offers more accurate measurements of some of their most stunning features.
For example, the research has confirmed that the Tenzing Montes are the highest peaks on Pluto, boasting heights up to 3.7 miles (6 kilometers) above the nearby surface. That's the equivalent of Alaska's Denali mountain here on Earth, according to the team. It's also high enough that the scientists are more confident than ever that Pluto's surface is made of water ice — methane ice, for example, wouldn't be strong enough to hold up features that large.
Elsewhere on Pluto, the team identified possible locations where volcanic activity has shaped the dwarf planet's surface as well as a deep gash running more than 1,800 miles (3,000 km) around it, which scientists think shows the dwarf planet somehow extensively fractured earlier in its life.
The map of Charon shows an even more dramatic range of features, with even higher peaks countered by an abyss deeper than the lowest point on Earth.
Because the process took advantage of the sun illuminating the harsh terrain, scientists have only been able to piece together the surfaces of Pluto and Charon that New Horizons flew over during their daytime — about 78 percent of Pluto and 45 percent of Charon.
That means both bodies are still hiding some secrets for their next robotic visitors, according to New Horizons principal investigator Alan Stern, a planetary scientist at the Southwest Research Institute in Texas.
"I can’t wait to see the other side of Pluto revealed in detail by a future mission to orbit the planet," Stern said in the statement.