Escape Velocity Calculator

ORBITAL PHYSICS

Newton's cannon for any world. Fire from the Moon, Pluto or a neutron star and watch each shot fall back, orbit or escape, worked out on the device from NASA JPL figures. Native on iPad in every orientation, with an optional sidebar.

Escape velocity and orbital physics app for iPhone and iPad. Newton's cannon from the Principia drawn live on thirty-six worlds, from Mercury and the Moon to Pluto, asteroids and a comet, a white dwarf, neutron stars and black holes, with every shot shown falling back, orbiting or escaping. Figures for the planets, moons and asteroids come from NASA's Jet Propulsion Laboratory and are sourced in the app. Famous shots from the Paris Gun on Pluto to Jules Verne's Columbiad, a ladder of escape speeds, the rocket equation in Newtonian and relativistic forms, and a forge to build your own worlds and squeeze them into black holes. Saved setups and share cards. Runs natively on iPad in every orientation, with an optional sidebar in place of the tab bar. No account, no subscription and fully offline.