Old Math

If the movie Hidden Figures is at all historically accurate, they solved their unsolvable navigation issue with Euler's Method, which is called old math in the movie.

Astrology is old math for mapping the gravitational ripples we need to understand for navigating between planets, like a sailing ship on the sea.

An astrological chart is a geocentric map of the solar system full of notes about interactions between the gravitational wakes and eddies of other heavenly bodies as we experience those gravitational pressures on Earth.

You just need to translate it to a space flight navigation tool. 

It already has a rich history of observations of turbulence, dead zones, high pressure zones, harmonic confluence etc. Figuring out how to translate thousands of years of observations such as "When planets change direction, you are in for a bumpy few days." to space weather flight turbulence will give you access to a wealth of existing knowledge about gravitational sea waves, so to speak.