NASA Spacecraft Reveal Mysteries Of Jupiter And Saturn Rings

In a celestial forensic exercise, scientists analyzing data from NASA's Cassini, Galileo and New Horizons missions have traced telltale ripples in Saturn and Jupiter's rings to specific collisions with cometary fragments that occurred decades, not millions of years, ago.


Read more: http://www.nasa.gov/home/hqnews/2011/mar/HQ_11-095_Cassini_Ripple.html