Seismology has been ubiquitous on Earth for decades, and missions such as InSight have recently provided the same data for the inside of Mars. Understanding a planet’s inner workings is key to understanding its geology and climate. However, the inner workings of Venus, arguably our closest sister planet, have remained a mystery. The sulfuric acid cloud and scorching surface temperatures probably don’t help. But Siddharth Krishnamoorthy from NASA’s Jet Propulsion Laboratory and Daniel Bowman of Sandia National Laboratory think they have a solution — use seismometers hanging from balloons.
