jul 162013
 
New Neptune Moon Discovered

  NASA’s Hubble Space Telescope has discovered a new moon orbiting the distant blue-green planet Neptune. This brings the number of known satellites circling the giant planet to 14. This diagram shows the orbits of several moons located close to the planet Neptune. All of them were discovered in 1989 by NASA’s Voyager 2 spacecraft, [continue reading]

apr 102013
 
Rain is Falling from Saturn’s Rings

  Astronomers using the W. M. Keck Observatory tracked the “rain” of charged water particles into the atmosphere of Saturn and found the extent of the ring-rain is far greater, and falls across larger areas of the planet, than previously thought. The work reveals the rain influences the composition and temperature structure of parts of Saturn’s [continue reading]

sep 112012
 
Saturn's Moon Mimas Creates Clumps in the Ring System

  Clumpy particles in Saturn’s B-ring provide stark contrast to the delicately ordered ringlets seen in the rest of this view presented by the Cassini spacecraft. Saturn’s B-ring is the largest and brightest of the gas giant’s rings, the outer portion of which is seen in the left side of this image. Ring clumps and strands [continue reading]