ORBITER is a completely FREE space flight simulator, which takes you beyond the boundaries of ‘atmosphere. Launch the Space Shuttle from Kennedy Space Center to issue a Satellite, Rendezvous with the ISS International Space Station or take the futuristic Delta-glider for a tour through the solar system – the choice is yours. But make no mistake! – ORBITER is not a space shooter. The emphasis is on realism and the learning curve using it can be steep. Be prepared to invest some time and effort to cast a blind eye to the orbital mechanics, and you’ll understand how incredible is this simulator, making you experience firsthand the sensations of space flight beyond the ‘atmosphere. A good starting point are Basics of Space Flight, and R. Braeunig ‘s Rocket & Space Technology. To discuss with other Orbiter users, have a look at one of the Orbiter forum. More information and resources for users and developers can be found under the Wikipedia entry Orbiter OrbiterWiki and the site, both maintained by the Orbiter community. Good Flight TransOrbitale All! P.s. Since that the reference site is in English, if you have any questions about how to download and install both the basic software that the textures in high resolution of the various planets, leave a comment below the article, we will try to answer everyone.