Astronomers using the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) instrument on ESO’s Very Large Telescope have imaged Jupiter’s icy moons Europa and Ganymede in infrared light. This image from the SPHERE instrument on ESO’s Very Large Telescope shows Europa; the different colored regions provide clues to the composition and history of the moon. Image credit: ESO / King & Fletcher. The Galilean moons — Io, Europa,...