2024 AD USA MATHWORLD WOLFRAM STELLA OCTANGULA

The stella octangula entry on Wolfram MathWorld, Wolfram Research's online mathematics encyclopedia: the compound of a tetrahedron and its dual, named by Johannes Kepler and shown here as a stellation of the octahedron, the solid shared by both interpenetrating tetrahedra. MathWorld notes that the two tetrahedra's edges trace out the twelve face diagonals of a cube, and that the compound's convex hull is that same cube, the identical stellated-octahedron form that runs through this whole corpus under its more common name, the merkaba.

The card

• Date — 2,024 AD
• Where — Wolfram Research, publisher of MathWorld, Champaign, Illinois. 40.1164, -88.2434 — site
• Evidence grade — WEB-PHOTO

Sources

• mathworld.wolfram.com

Works Cited

• Source, Title, Publisher, Year.