.

This program has been tested on Windows XP 32 and 64 bits. Should also work in earlier versions of Windows.

Earth belongs to a group of small, inner solar-system planets, including Mercury, Venus, and Mars, which all consist of a mantle made of silica-based minerals above an iron-rich core and crusts that show evidence of meteorite bombardment and volcanic lava flow. Beyond these basic similarities, and despite their similar formation processes in the inner solar system, these four planets are strangely different from one another. While the Earth's surface temperatures are relatively constant, Mercury goes through daily cycles of heat high enough to melt lead and cold deep enough to freeze carbon dioxide gas.

Featuring a wealth of incredible astronomical photographs, Space is perfect for anyone interested in astronomy, space imagery, and the history of space exploration. Space takes us on an imaginary journey that starts on a launch pad, goes toward the center of our Solar System to see the inner planets and the Sun, and then flies outward past the outer planets and on to the fringes of the Solar System.

Tower Defense: Lost Earth for iPhone/iPod touch only. Universal version also available!

Google Earth - Combines the power of Google Search with satellite photos, maps, landscapes, and three-dimensional buildings, so you can get geographic information about the world with just one click. Enterprise Edition allows you to take full advantage of Google Earth inside the company.