In 1989, Voyager 2 measured winds up to 2,100 kilometres an hour circling an Earth-sized storm on Neptune; by 1994, when Hubble looked again, the storm had simply vanished, unlike Jupiter’s Great Red Spot, which has raged for more than a century

Neptune's massive storms vanish in years, while Jupiter's have endured for centuries—a cosmic mystery about what makes some planetary tempests immortal and others ephemeral. The post In 1989, Voyager 2 measured winds up to 2,100 kilometres…

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1. SpaceDaily 12 Aug
   In 1989, Voyager 2 measured winds up to 2,100 kilometres an hour circling an Earth-sized storm on Neptune; by 1994, when Hubble looked again, the storm had simply vanished, unlike Jupiter’s Great Red Spot, which has raged for more than a century ↗