NASA has released an all-new animation of a giant lava lake during two close flybys of Juno spacecraft on the surface of Jupiter’s moon Io, the Science Times reported.

One of Jupiter’s mysterious moons is Io, which is home to hundreds of volcanoes that actively spew out fountains of lava dozens of miles high. In fact, Io is the most volcanically active world in the entire Solar System.
The discovery was made possible by Juno’s instrument called the Jovian Infrared Auroral Mapper, or JIRAM. The Italian Space Agency designed it to detect the infrared light given off by the boiling-hot lava lakes.

High spatial resolution in the infrared images provided by JIRAM, coupled with Juno’s propitious positioning during flybys, showed that the entire surface of the Galilean moon is covered in lava lakes within caldera-like formations. The team found out that this region is covered by around 3% of one of these molten lava lakes.

According to Juno co-investigator Alessandro Mura from the National Institute for Astrophysics in Rome, the lava lake is mostly covered by its thick molten skin with a ring of exposed lava around its perimeters.