Aquarius is the 11th astrological sign in the Zodiac, originating from the constellation Aquarius. Under the tropical zodiac, the sun is in Aquarius typically between January 20 and February 18. The Aquarius-born people are humanitarians to the core. They are a progressive and modern lot. Broad-minded and creative, they are the real truth-seekers. When it comes to relationships, the sign of Aquarius can bring a lot of stress and solitude, and people born under this sign tend to think too much while feeling too little.