# n-body choreography

An ** n-body choreography** is a periodic solution to the n-body problem in which all the bodies are equally spread out along a single orbit.

^{[1]}The term was originated in 2000 by Chenciner and Montgomery.

^{[1]}

^{[2]}

^{[3]}One such orbit is a circular orbit, with equal masses at the corners of an equilateral triangle; another is the figure-8 orbit, first discovered numerically in 1993 by Cristopher Moore

^{[4]}and subsequently proved to exist by Chenciner and Montgomery. Choreographies can be discovered using variational methods,

^{[1]}and more recently, topological approaches have been used to attempt a classification in the planar case

^{[5]}

## References

- 1 2 3 Vanderbei, Robert J. (2004). "New Orbits for the n-Body Problem".
*Annals of the New York Academy of Sciences*.**1017**: 422–433. arXiv:astro-ph/0303153. Bibcode:2004NYASA1017..422V. doi:10.1196/annals.1311.024. PMID 15220160. - ↑ Simó, C. [2000], New families of Solutions in N-Body Problems, Proceedings of the ECM 2000, Barcelona (July, 10-14).
- ↑ "A remarkable periodic solution of the three-body problem in the case of equal masses". The original article by Alain Chenciner and Richard Montgomery. Annals of Mathematics, 152 (2000), 881–901.
- ↑ "Braids in classical dynamics". Moore's numerical discovery of the figure-8 choreography using variational methods. Phys. Rev. Lett. 70, 3675.
- ↑ Montaldi, James; Steckles, Katrina. "Classification of symmetry groups for planar n-body choreographies". arXiv:1305.0470.

## External links

- Cris Moore's 1993 paper
- Some animations of 2-d and 3-d orbits, including the figure-8
- Greg Minton's choreography applet which allows the user to search numerically for orbits of their own design
- Animation of the solution with three bodies following each other in a figure of eight orbit
- Youtube videos of several n-body choreographies
- Feature column on Simó's Choreographies for the American Mathematical Society
- A collection of animations of planar choreographies

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