- Ruchba (stars.astro.illinois.edu)
Oddly, while the Omicrons have no proper names, dimmer Omega-1 (the brighter and western of its pair) is known as Ruchba (from an Arabic phrase meaning “the Hen’s Knee), which is not be confused with the OTHER Ruchbah, Delta Cassiopiae, the two being distinguished only by their English spellings.
- Octahedron (Wikipedia)
In geometry, an octahedron (pl.: octahedra or octahedrons) is a polyhedron with eight faces. One special case is the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex. Regular octahedra occur in nature as crystal structures. Many types of irregular octahedra also exist, including both convex and non-convex shapes.
