The Tropical Zodiac Primary Factors (as entered in Wikipedia),
by Robin Armstrong
The tropical zodiac is the zodiac of seasonal factors as opposed to the sidereal zodiac of constellation factors. The primary seasonal factors are based on the sunlight. In fact the tropical zodiac could be defined as the changing ratio of light and darkness across the year.
First factor: Half of the year daylight is increasing, and the other half darkness is increasing.
Second factor: Half of the year there is more daylight than darkness, and the other half there is more darkness than daylight.
Third Factor: the four seasons.
Winter: Daylight is increasing and there is more darkness than daylight.
Spring: Daylight is increasing and there is more daylight than darkness
Summer: Darkness is increasing and there is more daylight than darkness.
Autumn: Darkness is increasing and there is more darkness than daylight.
When daylight is greater, in Spring and Summer, we have more light and time to do things, it is warmer and life is more independent and free. These signs are called the I-Me signs of the zodiac. They generally do things for themselves, and relationships are add-ons because they are not inclined to be followers! Aries, Taurus, Gemini, Cancers, Leos and Virgos are independent processors (I-Me people).
When darkness is greater in Autumn and Winter, there is less light and less time to do things, it is colder and life demands more caution and awareness of vulnerabilities.
These signs tend to get their meaning in life from being related to others and being sensitive or aware of the subsequent needs or vulnerabilities of others. These are the called the social or the We-Us signs of the zodiac, where relationships to others predominate over being alone and independent.
Individuals born when daylight is increasing are striving to be more independent and free.
Individuals born when darkness is increasing are striving to be more relevant to others and to be part of a community or group.