Sky Map is a community / web application that worked well might qualify as the Google Maps looking backwards, or to the sky. Database that is available is enormous and we can find everything from photos, videos in real time, articles on specific stars and constellations, etc ...
It also has classified types of constellations, as well as forums where you can find true lovers of the stars. And not least, provides an API that lets you make your own mashups on the Sky Map.
World Sunlight Map
World Sunlight Map lets you see the Earth illuminated by the Sun so it is possible to know at any time of day where it is daytime and where it is night. The image is updated every 3 hours.
Earth from Space
Would you like to see is The Earth from outer space? It allows you to simulate as seen on planet Earth from various points.
YourSky allows you to generate interactive maps of the sky from the place you wish, location and other parameters of configuration.
International Space Station
International Space Station Would you like to see happening at the moment the International Space Station?