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030009

The trailing face of Jupiter's inner satellite Io is shown in this photo taken by Voyager 1 on March 3, 1979, from a distance of 1.7 million miles. A bright yellow-orange equatorial band (lower left to upper right) separates the darker reddish-brown polar zones. The north pole is at upper left. Characteristic of Io's surface is the profusion of dark spots commonly surrounded by rings of brighter material. The smallest dark spot visible in this view is 30 kilometres wide; the largest, on the left is about 400 kilometres across. The large heart-shaped feature with a dark spot near its centre could be Io's equivalent of an impact basin such as Mare Orientale on the Moon.

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The trailing face of Jupiter's inner satellite Io is shown in this photo taken by Voyager 1 on March 3, 1979, from a distance of 1.7 million miles. A bright yellow-orange equatorial band (lower left to upper right) separates the darker reddish-brown polar zones. The north pole is at upper left. Characteristic of Io's surface is the profusion of dark spots commonly surrounded by rings of brighter material. The smallest dark spot visible in this view is 30 kilometres wide; the largest, on the left is about 400 kilometres across. The large heart-shaped feature with a dark spot near its centre could be Io's equivalent of an impact basin such as Mare Orientale on the Moon.