This Demonstration shows Kepler's two semisolid polyhedra.
THINGS TO TRY
Kepler found two semisolid polyhedra: one composed of star octagons, the other of star decagons [1, pp. 173–174]. These can be completed to uniform polyhedra.
 P. R. Cromwell,
, Cambridge: Cambridge University Press, 1997.
Wolfram Demonstrations Project
Published: August 18, 2014
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