The hemispheric view of Venus, as revealed by this space wallpaper more than a decade of radar investigations culminating in the 1990-1994 Magellan mission, is centered on the South Pole. The Magellan spacecraft imaged more than 98% of Venus at a resolution of about 100 meters; the effective resolution of this image is about 3 km. A mosaic of the Magellan images (most with illumination from the west) forms the image base. Gaps in the Magellan coverage were filled with images from the Earth-based Arecibo radar in a region centered roughly on 0 degree latitude and longitude, and with a neutral tone elsewhere (primarily near the south pole).
(Image: © NASA/JPL/USGS)