What ever happened to Neptunes Great Dark Spot, the one discovered by Voyager?
It went away before HST could come online. Voyager data indicated that it was drifting toward the equator and would probably cross the equator only a few years after Voyager, and would probably not survive that. That seems to be what happened. Since 1994 (when the refurbished Hubble Space Telescope came on-line), there have been other Great Dark Spots seen by HST in Neptune’s *northern* hemisphere, but none for the past five years or so, though.
