90482 Orcus Etruscan equivalent of the Roman Pluto, and later became an alternate name for Pluto. The surface of Orcus is relatively bright with albedo reaching 23%, grey in color and water-rich. The ice is predominantly in crystalline form, which may be related to past cryovolcanic activity. Other compounds like methane or ammonia may also be present. The existence of a satellite allowed astronomers to determine the mass of the system, which is approximately equal to that of the Saturnian moon Tethys. The ratio of masses of Orcus and Vanth is uncertain, possibly anywhere from 1:33 to 1:12. The diameter of Orcus
Gate deities of the underworld Gate deities of the underworld The Gate deities of the underworld were ancient Egyptian minor deities charged with guarding the gates of the Egyptian underworld. The Egyptians believed that in the netherworld, the Duat, there were various gates, doors and pylons crossed every night by the solar boat (Atet) of the sun-god Ra and by the souls directed to the world of the dead. Ancient funerary texts provide many different descriptions of the afterlife gates. Sometimes more than 1,000 guardian deities are listed. According to a more general view, every gate was guarded by a minor god who allowed access