Dog days sometimes used for the lethargic summer markets. Various computations of the dog days have placed their start anywhere from 3 July to 15 August and lasting for anywhere from 30 to 61 days. They may begin or end with the cosmical rising or heliacal rising of either Sirius in Canis Major or Procyon (the "Little Dog Star") in Canis Minor and vary by latitude, not even being visible throughout much of the Southern Hemisphere. Sirius observes a period of almost exactly 365¼ days between risings, keeping it largely consistent with the Julian but not the Gregorian calendar; nonetheless, its dates
The Sirius Mystery about Sirius B. They could very well have acquired such knowledge abroad, passing it on to their tribe later. Sirius B was first observed in 1862, and had been predicted in 1844 on dynamic grounds. However, Oberg does concede that such assumptions of recent acquisition are "entirely circumstantial" and have no foundation in documented evidence. The skeptic Jason Colavito counts "The Sirius Mystery" among the body of works in a tradition of ancient astronaut ideas that was ultimately inspired by H. P. Lovecraft's Cthulhu Mythos in his 2005 book "The Cult of Alien Gods: H. P. Lovecraft and Extraterrestrial Pop