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Great Red Spot

Jupiter's Great Red Spot is a giant storm similar to a hurricane on Earth. Unlike a hurricane, the spot is "anti-cyclonic" - it's a high pressure storm while hurricanes are centers of low pressure.

The spot is very large. Three Earths could fit within its boundaries. It's also long-lived. It has been observed since telescopes were invented about 400 years ago.

Voyager 1 took this image of Jupiter and Ganymede when the spacecraft was a little over a month away from it's closest approach to the giant planet.

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Voyager 1 took this image of Jupiter and Ganymede when the spacecraft was a little over a month away from it's closest approach to the giant planet. (Picture)