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Jovian System

Voyager 1 took this photo of Jupiter and two of its satellites, Io on the left and Europa on the right. Io is about 350,000 km (217,000 mi) above Jupiter's Great Red Spot; Europa is about 600,000 km (372,000 mi) above Jupiter's clouds. Although both satellites have about the same brightness, Io's color is different from Europa's. Io's equatorial region shows two shades of red, possibly indicating different surface materials.

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