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Rh by name along with Boundless Time. The Younger Avestan texts do not furnish us with any data to enable us to form any idea of this concept, but we learn from the later scriptures that it refers to the world's cycle of twelve thousand years.

Thwasha. Space, or the infinite expanse, is faintly personified under the name Thwasha Khvadhata, or Sovereign Space. It is generally invoked along with the genius of time. In one place it is depicted as going alongside of Mithra. It is referred to by Eudemus, as quoted by Damascius, under its Greek pronunciation Topos, who says that the Magi name the cosmos by this name and from it are disjoined light and darkness. Like Time, it is not ranked among the angels.