Venus May Still Be Geologically Alive, New Models Suggest Active Volcanoes

ETH Zurich researchers have unveiled new computer models that challenge the long-held belief that Venus is geologically dormant. The findings indicate that Venus could still host active volcanoes and remain tectonically active to this day. This revelation has significant implications for both planetary science and future space missions.

Venus, often referred to as Earth's sister planet due to its similar size and mass, has long been a subject of fascination among scientists. However, the extreme surface temperatures and toxic atmosphere have made it difficult to study in detail. Previous observations had suggested that Venus had not experienced significant geological activity for over 100 million years. This perception was based on the assumption that the planet's rift valleys formed during an earlier period when tectonic activity was more prevalent.

The ETH Zurich team, led by Professor Taras Gerya and including Master’s candidate Xi Yang as lead author, developed advanced computer models to simulate Venusian surface features in high resolution. These models provided unprecedented detail about the formation of rifts on Venus, which are similar to those found on Earth but have remained largely unexplained due to Venus's harsh conditions.

The team's research revealed that the broad ridges known as 'rift flanks' form along the edges of rift valleys when these geological features are still relatively young. This finding suggests that the formation process occurs during periods of active tectonic movement, rather than long after such activity has ceased. The simulations also indicated that the rifts open at a rate between 3 and 10 centimeters per year, much faster than previously thought.

Moreover, the models showed that these geological features flatten rapidly once the movement stops, providing further evidence of recent tectonic activity. By comparing the Venusian surface formations with erosion patterns on Earth, the researchers concluded that Venus remains geologically active and has a more dynamic interior than previously believed.

These findings could have profound implications for future space missions to Venus. NASA and ESA are currently preparing several missions aimed at exploring the planet's geological history in greater detail. The ETH team is already collaborating with ESA’s EnVision mission, scheduled for launch in the early 2030s, which will conduct a comprehensive study of Venus from its core to its upper atmosphere.

The discovery not only enhances our understanding of Venus but also provides valuable insights into planetary formation and dynamics. This information could be crucial in identifying rocky exoplanets that may support life, as it helps scientists better assess the likelihood of geological activity on other planets based on their surface features.

In conclusion, these new models challenge long-standing assumptions about Venus's geological state and open up exciting possibilities for further exploration and research into Earth-like planets within our solar system and beyond.