Description Advanced analysis of decades-old data from NASA’s Galileo spacecraft identifies ammonia-bearing compounds discovered on the surface of Jupiter’s moon Europa, as shown in this composite image. Zooming in on an area about 250 miles (about 400 kilometers) wide, the black-and-white mosaic to the right is composed of multiple images from Galileo’s Solid-State Imaging camera. […]

Source: https://science.nasa.gov/photojournal/ammonia-bearing-compounds-discovered-at-surface-of-jupiters-moon-europa/