Circulo Con Raya En Medio Guide

In some ancient astronomical charts, a circle with a horizontal line through the middle represented Earth.

Introduced by (Bourbaki group) in 1939. He was inspired by the Norwegian letter Ø. circulo con raya en medio

Often represents a "Minus" sign in a circle (used in UI to "remove" something) or the Greek letter Theta. In some ancient astronomical charts, a circle with

Derived from the Greek letter , but standardized in technical drawing. The symbol is often confused with the empty set. In some ancient astronomical charts