Sirius

Definitions

1. A telescopic binary star, visually the brightest star in the night sky, a part of the northern constellation of Canis Major (the Greater Dog), one of three stars in the Winter Triangle asterism. Long understood as a single extremely luminous white star, it was associated in ancient Egypt with the Nile flood and in Greek and Roman culture with the "dog days" of summer.
2. The brightest star of the aforementioned star system; the white main-sequence star Sirius A.
   specifically

Equivalents

CEFR level