Castor
/ˈkɑːstə(r)/1
- Greek Mythology the twin brother of Pollux【希腊神话】卡斯托耳（波吕丢刻斯的孪生兄弟）。见DIOSCURI.
2
- Astronomy the second-brightest star in the constellation Gemini, close to Pollux. It is a multiple star system, the three components visible in a moderate telescope being close binaries.【天文】北河二。