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Vienna, the capital city of Austria, seen from space by the Ikonos satellite. North is at top. The River Danube is at upper right. Launched in 1999, Ikonos was the first commercial satellite to collect data at one-metre resolution. The satellite, which orbits at an altitude of 681 kilometres, is owned by Space Imaging, Colorado, USA. Image size: 3x3km. (KEYSTONE/SCIENCE PHOTO LIBRARY/SPACE IMAGING EUROPE)