The first Google Sky version to be created was on the virtual globe program called Google Earth. It features a number of layers, similar to the earth mode. It is mapped with images on the inside of the Google Earth sphere, with the north and south poles lining up with the two poles in Google Sky. As with other planetarium programs, it is viewed from the inside looking out from the center. It is currently facing competition from Microsoft's WorldWide Telescope.
Google also runs a browser-based version of Sky, which was created in response to the popularity of the Google Earth application. Google Sky Website was launched on March 13, 2008. It's accessible from any web browser and operating system and available in 26 languages (the first Google Maps product to support right-to-left languages). It was coded by Diego Gavinowich, a Latin America Code Jam finalist from Buenos Aires who joined Google for a winter internship, with the help of other engineers on their 20% time.