In 1989, the Great Dark Spot, an anticyclonic storm system, was discovered by NASA's "Voyager 2" spacecraft. The storm resembled the Great Red Spot of Jupiter. However, on 2 November 1994, the Hubble Space Telescope did not see the Great Dark Spot on the planet. Instead, a new storm similar to the Great Dark Spot was found in the planet's northern hemisphere. The reason why the Great Dark Spot has disappeared is unknown. The Scooter is another storm, a white cloud group farther south than the Great Dark Spot. Its nickname was given when first noticed in the months leading up to the "Voyager" encounter in 1989. It moved faster than the Great Dark Spot. Later images showed clouds that moved even faster than Scooter. The Wizard's Eye/"Dark Spot 2" is another southern cyclonic storm, the second strongest storm seen during the 1989 encounter. It originally was completely dark, but as "Voyager" came closer to the planet, a bright core developed.