There are many Dogon myths which display incredible amounts of astrological knowledge when taking into consideration that they are such a primitive people. According to Dogon mythology, when the Nommos arrived on Earth they told the inhabitants of their home solar system the was centered around the star Sirius. More specifically, the Nommos spoke of the star Sirius B, which they refer to as Po Tolo. This star was described to the Dogon people as a small star that had a great density. Some think that it was perhaps made with a mysterious and metal known as sagala. The Nommos not only spoke of general information about Sirius B, but they also gave specific statistics. This highly specific information included the star's orbital period of approximately 50 years.
Supposedly, the Dogon people have known this information for about 1,000 years. This is amazing, since it was not until the 20th century that astrologers found the star Sirius B. It is classified as a white dwarf that orbits around the star Sirius, and it has an orbital period of 50.04 +/- .09 years. The fact that the Dogon were amazingly accurate in their myths brings up many questions and problems within the scientific community.
Myths similar to those of Po Tolo tell of another star by the name of Emme Ya. Supposedly, around this star orbits the planet which is the home of the Nommos and of Amma, their creator. There is not much specific information in Dogon mythology that can be found on the topic of Emma Ya, and scientists have not yet found this star to this day. But if it is eventually found, it would be very astounding. It would support Griaule's other findings, making these myths accepted in the scientific community instead of being dismissed as hoaxes.