Title on cover: World Book Encyclopedia presents space travel.
System requirements: Windows: 486DX2/66 MHz processor or higher ; Windows version 3.1, 3.11, 95, 98, or later ; 8 MB RAM (16 MB recommended fo Windows 95; 24 MB recommended for Windows 98) ; VGA color monitor ; sSoundBlaster-compatible soudcard. Macintosh: 68020 processor or higher; System 7.0 or later ; 16 MB of RAM.