First aim to a place then launch the spacecraft by pressing enter Use the planets as gravity assists! Space to return space craft and r to clear paths If you dont know how to use gravity assists Aim the spacecraft near a planet, the planet will slingshot it to somewhere update log: release: added sun spacecraft and earth v1.0.0: added 3 planets mercury venus and mars v1.0.1: fixed planet gravity bug v1.1.1: added a feature for starting point and arrow v1.2.1: increased mars and mercury gravity Gravity units: Sun: 400 earth: 40 venus: 34 mars: 8 mercury: 4 this project is not realistic do not rely on it challenges: Try to get the right angle to launch the spacecraft and make it orbit the earth around 20 times Try to use mercury to bend the trajectory