Principia VS pcgeos

Principia is extremely impressive, they document all their math here: https://github.com/mockingbirdnest/Principia/tree/master/doc...

One interesting detail is that the source code makes extensive use of non-ASCII identifiers, for mathematical symbols and for the names of mathematicians. One of the two primary contributors is also an active contributor to Unicode

KSP2 is still patched conics. Also here's a free n-body mod made by modders, https://github.com/mockingbirdnest/Principia

Principia - 𝑛-Body and Extended Body Gravitation for Kerbal Space Program

But one should just be aware that KSP simplifies by only tracking the strongest source of gravity. This turns all orbits into actual ellipses. But there is a mod called Principia that replaces it with the proper thing, thus allowing for very chaotic (but cool) flight paths using less thrust.

Principia has n-body

Install Principia and Real Solar System, then try again :P

Theres a mod that changes that to N-body simulation, it's called Principia

I'd suggest looking at their readme: https://github.com/mockingbirdnest/Principia

Runs PC-GEOS! Which recently got open sourced, if you want to write software for it... https://github.com/bluewaysw/pcgeos

luckily we have sources now ( https://github.com/bluewaysw/pcgeos ) so that makes it much more fun. it's kinda weird to read TODO from 199x :)

i was a bit joking with geos but of course, if you are curious - then try it. by now even the sources are available if you want to read some cute assembly or dive in prehistoric kernel ( https://github.com/bluewaysw/pcgeos ).