When trying to learn about astrological compatibility, many astrology students focus on the sun sign. This can make it difficult to see the full scope of relationship and astrology. When assessing the potential of a relationship, there are many things to take into consideration. An astrology chart consists of a sun sign, moon sign, rising sign and eight planets; each planet rules a particular area of life and should be taken into consideration when assessing compatibility between two people. Synastry is also known relationship-astrology. It involves comparing two charts of astrology synastry chart to determine strengths and weaknesses in a relationship. Synastry is a valuable resource for people who want to examine their relationship with another person based on aspects between each person’s birth charts.In synastry, the interaction between both birth charts is examined, offering an accurate gauge of compatibility. Before you attempt to use synastry techniques, it is essential that you have an understanding of the basics of birth chart interpretation. Synastry uses many of same principles as birth chart interpretation. The following guide will help you understand synastry and identify your weaknesses and strengths. The Moon is the ruler of emotions and the way that each individual responds to them, so it is an important element in love relationships. Venus rules the love nature and determines what type of partner a person is attracted to. Mars is the sex drive, which makes this planet very influential in determining sexual compatibility.