Not water, but fire: NASA finds massive lava lake beyond the Earth during Juno mission
For decades, scientists have been trying to unlock the secrets of the solar system looking for signs of water and life beyond Earth. While water in its solid form isn’t new to space missions, finding it in liquid form, especially beyond Earth, still remains a major goal for the scientists.
Mars has long been at the center of attention, largely because it’s the closest potentially habitable planet. However, the farther we look, the more surprising things we find. One of NASA’s most exciting recent discoveries didn’t involve water but instead, a massive lava lake on one of Jupiter’s moons.
A giant lava lake on Jupiter’s moon
NASA’s Juno spacecraft captured one of the most stunning discoveries during its flybys of Jupiter’s moon Io, which is a massive lava lake called Loki Patera, estimated to be around 200 kilometers (125 miles) wide. According to Juno’s main investigator Scott Bolton, “The lake’s surface appears smooth and reflective, which means the lava has cooled down fast, forming obsidian rock,” he said during a press conference at the European Geophysical Union General Assembly in Vienna.Images and data were collected through JunoCam and the JIRAM (Jovian Infrared Auroral Mapper) instrument, revealing detailed views of volcanic features on Io’s surface.
How was the lake discovered
The discovery was made through JIRAM’s infrared observations, which detected hot spots inside multiple volcanic depressions. These hot zones indicated that lava lakes have a cooler crust in the middle and hotter edges, meaning that magma constantly overturns, comes up, and reshapes the landscape. It’s a dynamic process unlike what we see on Earth.
According to the Pulse, Alessandro Mura, a Juno co-investigator from the National Institute of Astrophysics in Rome, added that the data “suggests that 3% of Io’s atmosphere is covered by molten lava lakes.” He also noted that the lava likely cools quickly and forms a surface similar to obsidian glass a smooth, glass-like volcanic rock.
Io The most volcanic moon in the solar system
Io isn’t just another moon, it's the most volcanically active body in our solar system. This intense activity is caused by gravitational forces between Io, Jupiter, Europa, and Ganymede. These interactions cause extreme tidal heating within Io, generating massive internal friction and constant volcanic eruptions.
While Ganymede may be the largest of Jupiter’s moons and a candidate for containing a liquid metallic core, it’s Io that’s currently stealing the spotlight with its fiery surface and lava-filled landscape.
Why is this important
The discovery of Loki Patera and other active lava lakes on Io is a big win for planetary science. It proves that extreme volcanic activity isn’t limited to Earth and gives researchers a live example of how tidal heating caused by gravitational pull can power such geological events. Unlike Earth, where tectonic plate movement causes volcanic eruptions, Io’s volcanoes are fired up by a very different mechanism.
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