The constellations of Andromeda, Hydra and Vulpecula are now just a mouse click away for amateur star-gazers, following the launch of Google Sky. The tool is an add-on to Google Earth, a program that allows users to search a 3D rendition of our planet’s surface. Sky will allow astronomers a chance to glide through images of more than one million stars and 200 million galaxies. Optional layers allow users to explore images from the Hubble Space Telescope as well as animations of lunar cycles.
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