Locating any information regarding the astrological significance of Earth is quite difficult. This is because of the fact that we are earthlings and we view the skies from the planet itself. Hence, Earth is not mentioned among the planets in astrology as it can't be seen in heaven.
Even though Earth is not among the planets observed by astrologers, it still does play an extremely important role as one of the four basic elements. Its qualities include:
Taurus, Capricorn and Virgo are Earth signs.
Other than geocentric astrology, there is another is kind of astrology known as the heliocentric astrology. Here, all the planets are observed from the Sun and Earth is also one of the planets that is studied. It uses earth-related points that start from the horizon (Ascendant and Descendant) and the geological meridian of planet earth (Midheaven, IC).
Heliocentric Astrology uses an astrological chart quite like the traditional astrology. The only difference lies in the map's viewpoint. Even this map contains the various positions of the twelve signs of zodiac like the traditional chart, except for the fact that the heliocentric map has the Sun in the center instead of the traditional maps that have the Earth as their center.
But because there are still a large number of unanswered questions related to heliocentric astrology, it is not being widely adopted. Hence, Earth does not find a place for itself in the traditional astrology that all of us go for.
Planet is a term used by both astrologers and astronomers that refers to the same planets that comprise our Solar System. The names of our planets are listed in an outward order from the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.
Astrology also refers to the planets as two heavenly bodies that are also called the Lights or the Luminaries. They are called as the lights because they reflect the light of the Sun to our planet Earth. Besides the planets, astrology also takes in the star: Sun and the Satellite: Moon as part of the zodiac signs.
Even though Earth is not considered as one of the planets studied by astrologers, here are some other aspects related to the nature of earth.
Signs of the Zodiac - Basic Features As per Western Astrology
Significance Of Planets In Astrology
Four Elements In Astrology