Canis Major

Canis Major is the constellation of the Southern hemisphere of the sky the brightest star of which is Sirius. Its brightness is 1.46 of visual star magnitude. It is best seen in January and December. It is situated to the East of Orion and is partially situated in the Via Lacteal.
Canis Major is the ancient constellation. And the configuration of the bright stars really reminds the dog because "canis" is "the dog" in translation from Latin. Such group making the form of the dog was formed round the star Sirius.
Myths about the appearance of the star are connected with the appearance of the whole constellation. So, Ancient Greek myths call this dog the dig of Orion because it is situated between these constellations. The ancient Greek astronomer included this constellation to his book under the name "Canis" that means dog.
The main star Sirius has the white and blue colours. The name comes from Greek "seirios" that means shinning brightly. Its shinning is so bright because it is 23 times more intensive than the brightness of the sun. People of Ancient Egypt called Sirius "the Star of Nile" because the first morning rise of Sirius predicted the flood of Nile. Since ancient times this constellation was associated with the dog because its ancient Sumerian name is "the dog of the sun", Greeks called it simply the dog and Romans called it "canicula" that means "the little dog".
Sirius also has the companion that is called "puppy" among people. This star is not so bright as the shinning of the main star.