Earth and moon viewer
Earth and moon viewer
http://www.fourmilab.ch/earthview/vplanet.html
Earth observatory
Welcome to nasa's earth observatory, where you can monitor regional and global changes on our planet almost as they happen. here you can explore with nasa scientists the causes and effects of climatic and environmental change through the use of real satellite data.
http://earthobservatory.nasa.gov/
Planet
Www universalis
http://www.aplanet.eu/aplanet/index.php