Po Tolo . After much further observation, a companion star was discovered in 1862. This companion is a White Dwarf, which is a tiny star of immense mass and density. The Dogon name for Sirius B consists of the word for star, tolo , and po , the name of the smallest plant seed they know of. They also claim that the star's orbit is elliptical, with Sirius A as the focus of the ellipse.
Scientific research proves that th is indeed the case.
In addition, they believe that the star rotates on its axis, and indeed it does. However, this star has not yet been discovered by astronomers. Dogon knowledge of the universe does not stop there though, as they are also aware of the facts that Saturn has rings and that Jupiter has four major moons. The Dogon use four calenders, derived from the sun, moon, Sirius, and Venus, and have long believed in a heliocentric universe, in which the planets revolve around the sun. The Dogon believe that this knowledge comes from the Nommos , amphibious beings sent to earth from the Sirius star system.