The spotted atmosphere contains a very thin layer of oxygen ions equivalent to conditions 480 kilometers above Earth. Scientists say they have discovered a faint oxygen atmosphere around Saturn’s icy moon Dione which is 5 trillion times less dense than the air at Earth’s surface. Dione’s atmosphere was detected by NASA’s Cassini spacecraft, which has been orbiting Saturn since... 

Scientists have uncovered evidence of small lakes existing 3km below the crust of Europa. Scientists have uncovered evidence of warmer water melting and fracturing the outer layers beneath the surface of Jupiter’s icy moon, Europa. The information comes from the unmanned Galileo spacecraft, which arrived at Jupiter and its moons in 1995. The results, published in the journal Nature, suggest that...