> Their ship requiring multiple-stage launch from earth, but taking off without similar assistance from subsequent planets? I haven't watched Interstellar, but

> Their ship requiring multiple-stage launch from earth, but taking off without similar assistance from subsequent planets? I haven't watched Interstellar, but this would certainly make sense given Earth's escape velocity (11.19km/s) is over 2x that of Mars (5.03km/s), and nearly 5x that of the Moon (2.38km/s).