Toroidal planet

Artist's depiction of an earthlike toroidal planet. The odds of any toroidal planet forming might be infinitesimally small yet nonzero; allowing for an infinite universe, not only would a 'donut-shaped planet' almost certainly be bound to occur during the stelliferous era, it would occur infinitely often.[Note 1]

A toroidal planet is a hypothetical type of telluric exoplanet with a toroidal or doughnut shape. While no firm theoretical understanding as to how toroidal planets could form naturally is necessarily known, the shape itself is potentially quasistable,[1] and is analogous to the physical parameters of a speculatively constructible megastructure in self-suspension, such as a Dyson Ring, ringworld, Stanford torus or Bishop Ring.


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  1. ^ Marcus Ansorg, Andreas Kleinwächter, Reinhard Meinel (February 2003). "Uniformly rotating axisymmetric fluid configurations bifurcating from highly flattened Maclaurin spheroids". Monthly Notices of the Royal Astronomical Society. 339 (2): 515–523. arXiv:astro-ph/0208267. Bibcode:2003MNRAS.339..515A. doi:10.1046/j.1365-8711.2003.06190.x. S2CID 18732418.{{cite journal}}: CS1 maint: multiple names: authors list (link)