Sirius

/'siriəs/
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Definition

Noun: - The brightest star in the night sky: Sirius is the common name for the star Alpha Canis Majoris. It is a binary star system located in the constellation Canis Major (the Greater Dog). - A specific astronomical object: It is also known as the "Dog Star" and is prominent in many cultural and mythological traditions.

Usage Examples
  • Noun:
    • Sirius is easily visible in the winter sky in the Northern Hemisphere.
    • Ancient Egyptians used the heliacal rising of Sirius to predict the annual flooding of the Nile.
Advanced Usage
  • "Sirius A" and "Sirius B": Refers to the two stars in the Sirius binary system. Sirius A is the bright, primary star, while Sirius B is a faint white dwarf companion.
    • Astronomers study Sirius B to understand the late stages of stellar evolution.
Variants and Related Words
  • Dog Star: A traditional nickname for Sirius, derived from its location in the constellation Canis Major.
    • The Dog Star shines brightly near the constellation Orion.
Synonyms
  • Alpha Canis Majoris: The formal astronomical designation.
  • The Dog Star: A common colloquial name.
Related Phrases and Cultural References
  • "Dog Days of Summer": A phrase historically linked to the heliacal rising of Sirius, which coincided with the hottest period of summer in the Northern Hemisphere.
    • The term "dog days" originates from the ancient association of the hot summer weather with the star Sirius.
Noun
  1. the brightest star in the sky; in Canis Major

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