Neptune's nemesis


  • Heidi Hammel,

  • NASA


Radical. That's the word on the changes Neptune has undergone since 1989, according to Heidi Hammel of the Massachusetts Institute of Technology. Recent images from the Hubble Space Telescope reveal that a new spot has emerged in the northern hemisphere of this aquamarine-colored gaseous planet(see photo inset). The new spot, believed to be a huge storm system, is a near mirror-image of a previous spot in the southern hemisphere, which was discovered by Voyager 2 in a 1989 fly-by. Last June, Hubble images revealed that this first great dark spot had disappeared.