NASA scientists say images taken by the Hubble Space Telescope in 2014 suggest there may be water vapor plumes erupting off the surface of Jupiter's moon Europa. WSJ's Monika Auger reports.

Scientists believe that some icy material may come from eruptions, or plumes, on Europa's surface. These plumes could carry water from the ocean below into space, so analyzing what this material ...

Hubble researchers also reported new evidence of what they believe are hydrogen plumes erupting from Jupiter's moon Europa. The scientists published two research papers on their findings.

In 2013, the Hubble Space Telescope spotted water vapor on Jupiter's moon Europa. The vapor was evidence of plumes similar to the ones on Saturn's moon Enceladus. That, and other compelling ...

Only some 60 million years old, Europa's brittle surface appears to be in constant flux. Energy-rich compounds there could reach the ocean as pieces of the crust slide under each other.