Light-speed lab
Launch a light pulse from the Sun or Earth and compare travel times to the Moon, planets, and Voyager 1.
Gravity-assist lab
Adjust a spacecraft flyby and compare the incoming and outgoing velocity in a patched-conic model.
Orbit builder
Set launch conditions for an Earth-centered satellite or moon model, then explore its path, orbital period, live speed, and equal areas.
Earth–Mars transfer planner
Inspect dated Earth and Mars positions and search for an approximate transfer launch window.
Comet orbit lab
Explore a Halley-like elliptical orbit, its Sun-relative tail direction, and a Giotto flyby speed reference.
Solar system scale walk
Walk a model solar system with a 22 cm Sun and count steps between planetary distances.