Astrological Calendar. It is difficult to determine how old Astrology actually is , however it is possible that the establishment of the calendar and the origin of Astrology may have occurred at approximately the same time.
The movements of the sun, moon, planets and stars were observed very early in human history. The visible fixed cycles that were recognized were the Solar Day, The solar year and the lunar month.
With further reference to the astrological calendar, many connections were established between the planetary movements and cycles. Daily observations of the heavens were made in the beginning to establish a regular pattern to be used in conjunction with agriculture.
Relative to the astrological calendar, the common basis of many of the earliest calendars was the lunar month. As early as 46 BC, Julius Caesar constructed the Julian calendar, which was based on the solar rotation.
The Julian calendar proved to be approximately 12 minutes out of step with the sun, which resulted in an error of one day for every 128 years.
It was not until 1582 that is discrepancy was recognized and dealt with by Pope Gregory XIII. The problem was corrected that same year by the elimination of 10 days, the result being, that the fourth day of October was immediately followed by the 15th day of October.
It was established the insertion of the Leap Year's extra day was to be omitted on all 100th years, with the exception of multiples of 400. It is the tropical year that the calendar year attempts to approximate through the addition of an extra day every four years.
The Solar year does not start on the first day of January as does the calendar year, but begins on or near March 21. The Solar Year is divined into four equal parts, which are known as spring, summer, autumn, winter or as the four seasons.
The zodiac is based on 12 equal divisions of the year in time, beginning with the spring equinox (March 21 approximately). Each of it's 12 segments contain 30 degrees of longitude and are commonly referred to as a sign.
The signs of the zodiac were named after the constellations that are located along the zodiac. However, the constellations are of unequal size, with no clearly defined boundaries, so they are only associated withy the signs of the zodiac by name.
The Sun passes through all 12 segments or signs of the Zodiac in the course of a year. Its entry into each sign occurs at approximately the same time each year.
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