In the late 1930s, four Dogon priests shared their most important secret tradition with two French anthropologists, Marcel Griaule and Germain Dieterlen after they had spent an apprenticeship of fifteen years living with the tribe. These were secret myths about the star Sirius, which is 8.6 light years from the Earth.
The priests said that Sirius had a companion star that was invisible to the human eye. They also stated that the star moved in a 50-year elliptical orbit around Sirius, that it was small and incredibly heavy, and that it rotated on its axis. Initially the anthropologists wrote it off publishing the information in an obscure anthropological journal, because they didn't appreciate the astronomical importance of the information. What they didn't know was that since 1844, astronomers had suspected that Sirius A had a companion star. This was in part determined when it was observed that the path of the star wobbled. In 1862 Alvan Clark discovered the second star making Sirius a binary star system (two stars).
In the 1920's it was determined that Sirius B, the companion of Sirius, was a white dwarf star. White dwarfs are small, dense stars that burn dimly. The pull of its gravity causes Sirius' wavy movement. Sirius B is smaller than planet Earth.
The Dogon name for Sirius B is Po Tolo. It means star - tolo and smallest seed - po.
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The Dogons calendar is quite non-traditional in that its fifty year cycle is based neither on the Earth's rotation around the Sun (as is our Julian calendar) nor the cycles of the Moon (a lunar calendar). Instead, the Dogon culture centers around the rotation cycle Sirius B which encircles the primary star Sirius A every 49.9 - or 50 years.
This is most likely at least part new-age bullshit - see skepdic - [debunking thanks to Palacechime] - The Dogons, however, are still fascinating...
