When trying to learn about astrological compatibility, many astrology synastry chart students focus on the sun sign. This can make it difficult to see the full scope of relationship and astrology. You need to take many factors into account when looking at a relationship’s potential from an astrological perspective. A astrology chart is composed of a sun sign (moon sign), rising sign, and eight planets. Each planet governs a specific area of life, and should be considered when assessing compatibility. Synastry is also known relationship-astrology. It involves comparing two charts of astrology to determine strengths and weaknesses in a relationship. A valuable resource for those who wish to evaluate their relationship with another person using aspects of both their birth charts, synastry provides an accurate indicator of compatibility. A basic understanding of birth chart interpretation is necessary before attempting to employ synastry techniques because many of the same principles used in birth chart interpretation are also utilized in synastry. The following guide will help you understand synastry and identify your weaknesses and strengths. The Moon controls emotions and how each person responds, which is why it is important in love relationships. Venus controls the love life and determines who a person is drawn to. The sex drive is represented by Mars, making this planet extremely influential when determining sexual compatibility.