“What’s your sign?” Many people have uttered that line as an ice breaker in social settings since the 1960s. One person wants to know another person’s astrological birth sign. We’ve all learned that there are 12 signs of the zodiac along the Sun’s annual path around our sky. Did you know that the Sun actually passes through 13 constellations? Those born between November 30 and December 17 are not Sagittarians. They’re Ophiuchians!