Explore Earth and Space with NASA World Wind
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Google Earth sets the standard for browser based earth imaging but NASA, with its unrivalled resources has its own earth viewer program called World Wind. It’s an open source project combining satellite imagery from satellites and shuttle missions, combined and rendered in rich 3D or a range of snazzy looking overlays that reveal hidden details, the weather and topographic features. The user interface is not as slick as Google Earth, nor is it as fast and there’s not as much detail but it has a great Mac-inspired Toolbar; it’s great fun to play around with and you can jump straight from the Earth to explore the Moon, Mars, Jupiter or Venus
