What does Mars in astrology represent? Or in a birth chart. This is an interesting planet the energy of Mars focuses on a person’s drive, determination, anger management, can show how they enjoy sex, and a whole lot more. The sign that Mars in astrology is under, and the house of life in astrology will also show you a lot. In this short 101 on Mars in astrology, I share with you how to understand this planet in your chart, the chart of someone else, and what Mars can mean in different zodiac signs, and houses of life.