On May 16, 2023, NASA's

On May 16, 2023, NASA's Juno spacecraft flew past Jupiter's volcanic moon lo, and then the gas giant soon after. lo is the most volcanically active body in the solar system. Slightly larger than
Earth's moon, lo is a world in constant torment. Not only is the biggest planet in the solar system forever pulling at it gravitationally, but so are its Galilean siblings - Europa and the biggest moon in the solar system, Ganymede. The result is that lo is continuously stretched and squeezed, actions linked to the creation of the lava seen erupting from its many volcanoes.