Astronomers discovered a unique water-rich exoplanet the size of Saturn
Researchers were surprised by how much water vapor they found in a ‘hot Jupiter' - three times more than on Saturn. Credit: NASA, ESA.

Researchers were surprised by how much water vapor they found in a ‘hot Jupiter' - three times more than on Saturn. Credit: NASA, ESA. Although NASA has already confirmed thousands of exoplanets - planets outsides our solar system - what's perhaps most staggering is their sheer diversity.