The planets Mercury, Venus, Earth, and Mars, are the main factors that affect astrology.
The effect of the Sun, the Moon, and Mars could vary according to each sign.
The exact birth date of the person cannot be determined through astrology.
The influence of the Sun, the Moon, and Mars can greatly vary according to each sign.
The astrology birth chart gives all the information that you need about your personality.
The person born on themes (aka cusp) of a particular astrology sign will have much more in common with other people who are born around the same time, and this is due to the influence of the Sun, the Moon, and then Mars.
These three planets are the biggest influences of astrology.
Birth charts are the best way to determine astrology personality traits and actions.