...Nommos, according to Dogon legend, lived on a planet orbiting another star in the Sirius system. They landed on Earth in an "ark" that descended with great noise and wind.
It was the Nommos who brought the knowledge of Sirius B to the Dogon.
They provided the Dogon with some interesting information about our Solar System: that the planet Jupiter has four main moons, that Saturn has rings, and that the planets revolve around the Sun. These are all facts that Westerners discovered only after Galileo invented the telescope.