sirius

/'siriəs/

Thân thiện

The star Sirius shines brightly in the winter night sky.

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.

Học thuật

Noun

1. the brightest star in the sky; in Canis Major

Từ đồng nghĩa

• Sirius
• Dog Star
• Canicula
• Sothis