It's no wonder that Mars shows up red in the heavens -- red is the color of passion, and that's just what Mars rules. Your sex drive, your propensity for irritation, your urge to compete and succeed -- all fall within this powerful planet's realm.

It affects your attitude toward everything from team sports to dating, from how you argue with a friend to how you go after a promotion at work. It's also about your willpower -- whether you can motivate yourself to do what needs to be done or whether you need an extra push from the outside.

Your long-term ambitions are a big part of Mars's influence in your life, but it also affects you on a day-to-day basis. How do you put your energy to use? Some people like to conserve energy (translation: they can be a bit lazy!), while others are motivated to the nth degree, always up and running to the next thing, whether that's at home, at work or out with friends. Some people always act in accordance with the wishes of their family, while others operate from more personal interests.

Leadership is also within Mars's realm. Do you like to take charge or do you prefer following someone else's lead? Even if you're uncomfortable with a leadership position, this planet will push you to put your best face forward as you take on life's many challenges.

Mars rules the passionate signs of Aries and Scorpio. Read about Aries and Scorpio to learn more about these signs and how Mars influences them.

The planets are: Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto