Sirius signified certain emanations which caused its malignant influence. Anyone suffering its effects was said to be "star-struck" (, "astrobólētos"). It was described as "burning" or "flaming" in literature. The season following the star's reappearance came to be known as the "dog days". The inhabitants of the island of Ceos in the Aegean Sea would offer sacrifices to Sirius and Zeus to bring cooling breezes, and would await the reappearance of the star in summer. If it rose clear, it would portend good fortune; if it was misty or faint then it foretold (or emanated) pestilence. Coins retrieved from the island
The Sirius Mystery argue that the only way that the Dogon could have obtained what he understood to be accurate information on Sirius B was by contact with an advanced civilization; he considered alternative possibilities, such as a very ancient, advanced, and lost civilization that was behind the sudden appearance of advanced civilization in both Egypt and Sumeria. He personally found the theory of alien contact more convincing, but he did not claim certainty about it. Noah Brosch explained in his book "Sirius Matters" that cultural transfer could have taken place between 19th century French astronomers and Dogon tribe members during the observations