When The bright star Sirius breaks the eastern horizon,this Dog Star marks August's dog days. Why is Sirius known as the dog star ? its part of the constellation Canis Major,Orion the Hunter's dog,nipping at his heels... Orion the hunter is marked by his belt of three stars.
"Serious"ly...
http://earthsky.org/tonight/orion-heralds-return-of-sirius
