Kulthea is the name of a Planet, possibly parallel to Arda or Ambar, existing within Eä, but in a different plane or reality.It was identified with Ceril VII, an earth-like planet, seventh of fifteen planets and averaging 98 million miles from its primary, a G-type star. It had an axial tilt of about 25 degrees and a year of 350 days. Kulthea's diameter was approximately 8,600 miles, making it larger than Earth