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Dog Star

proper noun

  1. binary star system in the constellation of Canis Major
L1191593 on Wikidata ↗

Wiktionary

name

Etymology: From the fact that the star lies in the constellation of Canis Major (the "larger dog").

  1. A bluish-white star in the constellation Canis Major; Alpha (α) Canis Majoris A. A vertex of the Winter Triangle and the brightest star in the night sky. It is actually a binary star with a white dwarf companion star.