Castor most commonly refers to: Castor (star), a star in the Gemini constellation. Castor, one of the Dioscuri/Gemini twins Castor and Pollux in Greco-Roman mythology. Castor or CASTOR may also refer to: Science and technology. Castor (rocket stage), a family of solid-fuel rocket stages. Castor (software), data binding framework for Java. CASTOR (nuclear waste), cask for storage and transport of radioactive material. CASTOR experiment, "Centauro and Strange Object Research" at CERN. CASTOR (spacecraft), proposed space telescope. Castor sugar, fine sugar.
https://en.wikipedia.org/wiki/Castor