The tropical zodiac is a zodiac based upon tropical time, or the apparent motion of the Sun across the sky over the course of a year. The tropical zodiac fixes the position of the sun in the heavens at the northern hemisphere vernal equinox as the first point of the sign of Aries. The signs of the zodiac in tropical astrology are therefore currently divorced from the actual constellations of the zodiac. This is due to the Precession of the equinoxes. The tropical zodiac therefore uses a view of the heavens as seen from Earth approximately 2600 years ago when the northern hemisphere vernal equinox did occur within the constellation of Aries. Zodiac signs, 16th century , medieval woodcuts The zodiac (from Greek zoon, animal) is an imaginary belt in the heavens extending approximately 8 degrees on either side of the Suns apparent path (the ecliptic), that includes the apparent paths of the Moon and the planets Mercury, Venus, Mars, Jupiter, Saturn. ... The Sun is the star at the center of our Solar system. ... Illumination of Earth by Sun on the day of equinox The vernal equinox (or spring equinox) marks the beginning of astronomical spring. ... The First Point of Aries, also called the vernal equinox point, is one of the two points on the celestial sphere where the celestial equator intersects the ecliptic. ... Zodiacal man, attributing the various astrological signs to body parts; see the Medical astrology page for more examples Western astrology employs the tropical zodiac which divides the ecliptic into twelve signs of equal length starting at the first point of Aries, which is defined as the point at which the... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Precession (also called gyroscopic precession) is the phenomenon by which the axis of a spinning object (e. ...

This is in contrast to the sidereal zodiac, which is based on the apparent motion of the Sun against the actual constellations of the zodiac in the sky. Sidereal astrology is the practice by some western and all Indian astrologers of basing their study of the sky on the actual position of the planets in relation to the starry background. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ...

The tropical zodiac is largely exclusive to The Americas and western European astrologers. The Americas (sometimes referred to as America) is the area including the land mass located between the Pacific Ocean and the Atlantic Ocean, generally divided into North America and South America. ... This article is about the continent. ...

Some western astrologers choose to use the sidereal zodiac, practise Sidereal astrology and criticise the tropical approach as erroneous. This is a long running dispute within Western astrology. Astrology refers to any of several systems, traditions or beliefs in which knowledge of the apparent positions of celestial bodies is held to be useful in understanding, interpreting, and organizing knowledge about human affairs and events on earth. ... Sidereal astrology is the practice by some western and all Indian astrologers of basing their study of the sky on the actual position of the planets in relation to the starry background. ... Western astrology is the system of astrology most popular in Western countries. ...

Vedic Cosmologist Patrizia Norelli-Bachelet writes that a correct understanding of both the tropical and the sidereal zodiac are necessary for tracking and understanding the movement of the Earth and its species. In her approach, the two systems are not posed against each other. Patrizia Norelli-Bachelet (1938 - ), who also goes under the name Thea, is an astrologer, cosmologist, author and founder of the Aeon Centre of Cosmology. ...