- Sphere (Wikipedia)
A sphere (from Greek σφαῖρα, sphaîra) is a geometrical object that is a three-dimensional analogue to a two-dimensional circle. Formally, a sphere is the set of points that are all at the same distance r from a given point in three-dimensional space. That given point is the center of the sphere, and r is the sphere’s radius. The earliest known mentions of spheres appear in the work of the ancient Greek mathematicians.
- Aspidiske (stars.astro.illinois.edu)
ASPIDISKE (Iota Carinae). Most stars have no proper name; even some bright ones lack them. How they would envy this one, with not one, but THREE, from each of the classic stellar languages. “Aspidiske” (the Greek Iota star in Carina, the Keel of the ship Argo) comes from the Greek, and means “little shield” (referring to a decoration, not a defensive weapon).
