Definitions by BRENDAN
Google Earth
Similar to NASA's WorldWind, Google Earth is a program that allows you to scroll around the world and zoom in to wherever you like. A number of areas have satellite photography available to a high level of detail (you can see individual cars and stuff).
Google Earth seems to be an improvement on WorldWind because there is really high resolution imagery to a lot of areas around the world, rather than just Washington DC.
Google Earth by Brendan July 31, 2005