The general populace of Earth were unaware of his existence.
Place of Birth
Star Masters #1 (1995)
Sidereus was in charge of the genocidal weapon known as the Cauldron of Conversion, which was used to spread deadly plagues throughout the universe. This weapon was used to kill the M'Ndavians of the planet M'Ndavi, tenth from the sun of the B'Ibwo star system. While processing the Korbinites for termination with the destructive weapon, the Axi-Tun ship was boarded by the Star Masters, who were defeated by Throk and Dampyre. Sidereus planned to throw the Star Masters into the Cauldron to further his plans of galaxy wide destruction. However the Star Masters managed to escape and Sidereus, Aldebron and the rest of the ship’s crew were instructed to commit suicide by Votan, for failing to destroy the Korbinites. They complied but Aldebron and Sidereus faked their deaths to escape, with the intention to wrest the throne from Votan in the future.Sidereus and Aldebron have not been seen since their escape.