Being a very-simplest introduction to those beautiful methods which are generally called by the terrifying names of the Differential Calculus and the Integral Calculus
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/mathematics/calculus/calculus-made-easy-by-silvanus-p-thompson.md
Its position in the Southern Celestial Hemisphere means that the whole constellation is visible to observers south of 22°N.