Definition: In astronomy, a "hypozoic" system is a binary star system in which both stars are located within the same plane. This condition means that the two stars orbit each other at approximately the same angle of rotation relative to their common plane. The term comes from the Latin words "hypozio," which mean "below" or "underneath," and "zeta," which is a Greek word meaning "equal." In this context, it refers to two stars that are located below each