Fond memories of when I took a course on celestial mechanics. Weirdly enough, the theoretical framework was taught by a more "applied" researcher, whereas the "

Fond memories of when I took a course on celestial mechanics. Weirdly enough, the theoretical framework was taught by a more "applied" researcher, whereas the "problem solving" classes were taught by one local leading researcher in the field. I still remember determining degrees of singularities on collisions and regularisations near collisions as an "easy problem to get up to speed"!