THANKS TO SPACEFLIGHT SIMULATOR FOR SPONSORING NSF
Build and actually fly your very own rocket out of parts.
A Completely open ended sandbox game, you can build anything, fly anywhere and do anything you like.
Fully realistic rocket physics, including rocket stages, orbital mechanics, reentry, etc.
Real scale solar system, real size planets, with millions of kilometers of distance between the planets, and traveling to other planets can take months or years, so we have timewarp. It’s free and you can download it on your phone right now.