Anyone ever tell you that you have a strong personality? Ever feel obsessive about one area of your life? Ever feel way more like another sign rather than your Sun Sign? It is time you checked your birth chart — you just might have a Stellium. How do you find out? Well, a Stellium means you either have three or more planets in one Zodiac sign or you have three or more planets in the same house. To have a Stellium in your chart is rare and an astrological phenomenon.