astrology: sign of antichthon (counter-earth)

aliens analog antichthon asteroid astrology astronomy center central civilization constellation cosmos counter earth eclipse empyrean ephemeris equator essential fiction fire galaxy geocentric globe gloria heavens hestia hieroglyphics horoscope horus hypothetical mappa moon mundi orbit other outer planet pythagoreans quasi satellite science side sidereal sign solar space stars sun symbol system trojan twin ufo ufology underside universe vulcan zodiac