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A simple but useful application which retrieve an image from the internet and set it as a wallpaper every 30 minutes. Watch the sun rise and set all over the world on this real-time, computer-generated illustration of the earth's patterns of sunlight and darkness. The clouds are updated every 3 ... [More] hours with current weather satellite imagery. And every half hour, these images are composited and mapped onto a sphere by xplanet according to the relative position of the sun. The flat maps are post-processed by ImageMagick to cut off the 15 degrees nearest the north and south poles where cloud data is unavailable. 4 different types of maps: Mercator Peters Mollweide Equirectangular Dawn to dusk Moon Phase [Less]

SolarBeam is a desktop application for drawing solar diagrams. You supply the geographical position, it draws a diagram showing the Sun's trajectory over your location at various times of the year. It also shows the times of sunrise and sunset.