Using Hubble Space Telescope, astronomers have seen evidence of a massive geyser of water erupting from the surface of Jupiter’s icy moon Europa. This plume of water extends as high as 200 kilometers miles) above the surface.
Rings and Moons Circling Uranus (Credit: NASA and Erich Karkoschka, University of Arizona; via HubbleSite) (we have known of Saturn's rings for a very long time.it wasn't until the that rings were discovered around Neptune, Jupiter and Uranus)
Backlit Saturn - Seen from the Cassini SpacecraftThe Cassini spacecraft was sent by NASA and ESA to study Saturn and its moons. Two of Saturn’s moons, Enceladus and Tethys, appear in the bottom right of this image.
Here's some bling on an astronomical scale: A Jupiter-mass planet orbiting the newly discovered pulsar PSR is likely one gigantic diamond. The planet's ultra-high pressure has caused the carbon within it to crystallize into diamond, researchers