The short version
REBOUND is an open-source N-body simulator for astrophysical dynamics.
From the HackerLinks archive
REBOUND
REBOUND is an open-source N-body simulator for astrophysical dynamics.
At a glance:
First seen:2026-06-09
Last seen:2026-06-09
Times seen:1
Website:rebound.hanno-rein.de
Why it caught our attention
A stronger scientific alternative surfaced in a visualization thread.
Where it surfaced on Hacker News
2026-06-09
Editorial paraphrase
A commenter said it is what they use for n-body simulations and called it easy to use from C or Python.
Original threadShow HN: Gravity – interactive solar-system simulator, from Newton to Einstein
Also surfaced in this discussion
Gravity
Show HN: Gravity – interactive solar-system simulator, from Newton to Einstein
2026-06-09