- differential equations? nah, the solar system is a resonant clock, calculate using hyperdimensionality
- there's a lava lake on Io that vibrates to the precise resonance he predicted
- that pesky pertubation in Mercury's orbit gets resolved with a General Relativity correction
- and pen and paper not needed! though you'll need a microcontroller chip
I can't imagine the amount of work, over generations/centuries(?) that this library is based on. And now available for free for anyone to use (if they understand what they are doing). Amazing.