How did the Canis Major constellation get its name?


The Canis Major constellation is one of the most prominent and well-known constellations in the southern sky. It is best visible during the months of December through April in the northern hemisphere. But how did it get its name? Let’s take a closer look at the history and mythology behind the Canis Major constellation.

History of the Canis Major Constellation

The Canis Major constellation has been known since ancient times, with records dating back to the Babylonians in the 4th century BCE. The Greeks and Romans also recognized the constellation, with the Greek astronomer Ptolemy cataloguing it in the 2nd century CE. The name “Canis Major” comes from the Latin words for “greater dog,” as the constellation represents a dog.

Mythology Behind the Canis Major Constellation

In Greek mythology, the Canis Major constellation is associated with the story of Orion, a great hunter. According to the myth, Orion had a loyal hunting dog named Laelaps, who was so fast that it could catch any prey. Zeus, the king of the gods, was impressed by Laelaps’ speed and decided to reward the dog by placing it in the sky as a constellation. However, this created a paradox, as Laelaps was now chasing a hare that was also a constellation. To solve the paradox, Zeus turned them both into stone, and they remained as constellations forever.

Another myth associated with the Canis Major constellation involves the goddess Isis and her search for the dismembered body parts of her husband Osiris. According to the myth, Isis sent her dog, the constellation of Canis Major, to help her find Osiris’ body. The dog was successful in its mission, and Isis was able to reassemble Osiris and bring him back to life.


The Canis Major constellation has a rich history and mythology, dating back to ancient times. Its name comes from the Latin words for “greater dog,” as it represents a dog in the sky. In Greek mythology, it is associated with the story of Orion and his loyal hunting dog Laelaps, as well as the goddess Isis and her search for the body of her husband Osiris. Today, the Canis Major constellation remains an important part of astronomy and continues to fascinate stargazers and astronomers alike.