How NASA`s Cassini Saturn mission found a new target in the search for habitable worlds beyond Earth
(PHYSorg.com Space & Earth)

On Feb. 17, 2005, NASA`s Cassini spacecraft was making the first-ever close pass over Saturn`s moon Enceladus as it worked through its detailed survey of the planet`s icy satellites. Exciting, to be sure, just for the thrill of exploration. But then Cassini`s magnetometer instrument noticed something odd.