In Solar System VR you can basically fly trough our solar system. This app was made for the Google Cardboard and can or should only be played with it. Basically there is one control -> Look around! You’re moving in a moderate speed to the direction you’re looking. If the camera drifts, lay down your phone on a table and wait like 20secs until it stops moving, now it should be calibrated. For a better gameplay, the planet scales are not 100% real.