This was
your sky.

Io: The Prometheus Plume

Jupiter's volcanic moon Io displays two sulfurous eruptions in this color composite image from the Galileo spacecraft. On the left, a new bluish plume rises about 86 miles above the Pillan Patera volcanic caldera. In the middle, near the day/night line, the ring-shaped Prometheus plume rises 45 miles above Io, casting a shadow to its right. Named for the Greek god who gave mortals fire, the Prometheus plume is a persistent feature on Io.