Definition

Noun: 1. A star: Pollux is the proper name of the brightest star in the constellation Gemini. It is an orange giant star and forms one of the two "twin" stars in the constellation, the other being Castor.

Usage

• As a celestial body: The word "Pollux" is used almost exclusively as the name of this specific star. It is a proper noun and is always capitalized.
• In mythology and astronomy: It is commonly mentioned alongside its counterpart, Castor, referencing the mythological twins or the paired stars.

Examples

• In astronomy:
  • Pollux is slightly brighter than its celestial twin, Castor.
  • Astronomers have discovered a planet orbiting the star Pollux.
• In general context:
  • On a clear night, you can easily spot Pollux in the sky.

Advanced Usage

• "Castor and Pollux": This fixed phrase refers to the twin brothers from Greek and Roman mythology, who were transformed into the constellation Gemini. In astronomy, it names the two brightest stars in that constellation.
  • The myth of Castor and Pollux explains the origin of the Gemini constellation.

Variants and Related Words

• Beta Geminorum: This is the standard Bayer designation for the star Pollux within the Gemini constellation. (Note: Despite being the brightest, it is designated "Beta," while Castor is "Alpha." This is a historical anomaly.)
• Gemini: The name of the zodiac constellation containing Pollux and Castor.
• Castor: The other principal star in the Gemini constellation, traditionally paired with Pollux.

Synonyms

• Beta Geminorum (scientific designation).

Notes on Meaning

• Primary Meaning: The word's sole common meaning in modern English is as the name of the star. Its use outside of astronomical or mythological contexts is very rare.
• Mythological Origin: The name derives from Polydeuces (Pollux in Latin), one of the twin sons of Zeus in Greek mythology. This origin is integral to understanding its constant pairing with Castor.

Noun

1. the brightest star in Gemini; close to Castor