Venus' volcanoes are likely still spewing out lava, a new study suggests.
The European Space Agency's Venus Express spacecraft observed temperatures spiking by several hundred degrees Fahrenheit in some spots on the scorching-hot planet's surface.
The hotspots ranged from 0.39 square miles (1 square kilometer) to 115 square miles (200 square km). A closer look at these regions showed that they were likely hot due to lava running across the Venus surface, scientists said.
Scientists found the spots in a region called Ganiki Chasma, which is already known to be quite young in geological terms. The zone was previously examined by the Soviet Union's Venera spacecraft in the 1980s, and by NASA's Magellan mission in the 1990s.
The rifts in Ganiki Chasma are probably created when the crust is stretched by internal pressure, forcing magma to the surface, researchers said. This same process has been observed on Earth.
"We were able to show strong evidence that Venus is volcanically, and thus internally, active today," study co-author James Head, a geologist at Brown University, said in a statement. "This is a major finding that helps us understand the evolution of planets like our own."
The new study was led by Eugene Shalygin and Wojciech Markiewicz, both of the Max Planck Institute in Germany. It was published online in the journal Geophysical Research Letters.
Ganiki Chasma also was discussed in a presentation at the Lunar and Planetary Science Conference last year. That research, presented by Alexander Basilevski (a co-author on the new paper), revealed four hotspots in the region that stood out even in Venus' 800-degree-Fahrenheit (427 degrees Celsius) surface environment.
Venus Express spent eight years orbiting Earth's "sister planet" before running out of fuel and falling into the atmosphere this past December. Through part of 2014, the spacecraft performed risky dives into the Venus atmosphere to gather more information about its composition. The goal of these maneuvers was, in part, to gather data that could aid the design of possible future landers.
Get the Space.com Newsletter
Breaking space news, the latest updates on rocket launches, skywatching events and more!
Elizabeth Howell (she/her), Ph.D., is a staff writer in the spaceflight channel since 2022 covering diversity, education and gaming as well. She was contributing writer for Space.com for 10 years before joining full-time. Elizabeth's reporting includes multiple exclusives with the White House and Office of the Vice-President of the United States, an exclusive conversation with aspiring space tourist (and NSYNC bassist) Lance Bass, speaking several times with the International Space Station, witnessing five human spaceflight launches on two continents, flying parabolic, working inside a spacesuit, and participating in a simulated Mars mission. Her latest book, "Why Am I Taller?", is co-written with astronaut Dave Williams. Elizabeth holds a Ph.D. and M.Sc. in Space Studies from the University of North Dakota, a Bachelor of Journalism from Canada's Carleton University and a Bachelor of History from Canada's Athabasca University. Elizabeth is also a post-secondary instructor in communications and science at several institutions since 2015; her experience includes developing and teaching an astronomy course at Canada's Algonquin College (with Indigenous content as well) to more than 1,000 students since 2020. Elizabeth first got interested in space after watching the movie Apollo 13 in 1996, and still wants to be an astronaut someday. Mastodon: https://qoto.org/@howellspace