Scientists have made an exciting discovery using old data from NASA’s Magellan mission. They believe they found a massive underground tunnel on Venus, possibly created by volcanic activity. If confirmed, this would be only the second lava tube found on the planet, joining similar features on the Moon and Mars.
This finding contributes to an increasing amount of evidence that Venus might be more geologically active than previously thought. Many scientists viewed Venus as a lifeless planet, but new insights are challenging that perspective.
Lorenzo Bruzzone, a researcher from the University of Trento in Italy, highlighted the significance of this discovery. He mentioned, “Our knowledge of Venus is still limited, and this volcanic cavity could help validate theories that have long been hypothetical.” The discovery could pave the way for a deeper understanding of Venus’s geology.
Venus is often obscured by thick clouds, which makes direct observation difficult. Scientists rely on radar imagery to study the planet’s surface. Between 1990 and 1992, the Magellan orbiter mapped much of Venus using a radar system, creating a rich archive of images.
These maps revealed extensive surface features, including long chains of pits and potential underground lava tubes. In this recent study, the team focused on specific areas where the ground has collapsed, creating openings that may lead to underground voids. One of these features, located near Nyx Mons—one of Venus’ countless volcanoes—showed a radar pattern typical of collapsed lava tubes. Preliminary analyses suggest this tunnel could stretch for several dozen kilometers beneath the surface.
To fully understand its size and shape, more observations are needed. Fortunately, future missions to Venus could better explore these features. A fleet of upcoming missions is planned, including the European Space Agency’s EnVision mission. Equipped with advanced radar, this mission aims to probe several hundred meters below the surface. Bruzzone expressed optimism about future discoveries: “Our discovery is just the beginning of a long and fascinating research endeavor.”
This research was detailed in a paper published in Nature Communications on February 9. The continued exploration of Venus could reshape our understanding of not just our neighboring planet, but the dynamics of planetary geology as a whole.
For related readings, check out resources from NASA and articles on recent planetary missions here.
