Interpretation
The earth as a separate planet has little astrological significance because it is the position of the observer in astrology’s usual geocentric world view. The earth is represented in the geocentric chart by the ascendant and descendant axis, which show the points of the rising and setting sun on the horizon. The Imum Coeli shows the lowest point of the sun’s passage “under” the earth.
The heliocentric model, seldom used in astrology, does put the sun as the observer’s position, and consequently a heliocentric horoscope shows the earth as a separate planet. However, its position is always 180 degrees opposite the sun’s position in the geocentric chart.
Because astrologers seldom treat the earth as a planet in the usual sense, it has no rulerships, dignities, or affiliations. Some astrologers consider the earth to be a good match with Taurus, based on its affinity with this fixed earth sign.