The Sun enters the Zodiac sign Aquarius at January 21, 2018 and leaves it on February 19, 2018. Aquarius is the eleventh astrological sign in the Zodiac, originating from the constellation Aquarius. In astrology, Aquarius is considered a "masculine", positive (extrovert) sign. It is also considered an air sign and is one of four fixed signs. Aquarius has been traditionally ruled by the planet Saturn, and, since its discovery, Uranus has been considered a modern co-ruler of this sign. Individuals born when the Sun was in this sign are considered Aquarius individuals.
In Synastry, the natives of Aquarius are generally considered of the compatible with the natives to be other air signs, Libra and Gemini, and the natives of the fire signs, Aries, Leo and Sagittarius. Taurus and Scorpio are signs of the other nature (feminine/introverted), but are considered semi-compatible with Aquarius due to their having the same fixed quality. Aquarians can relate well to Cancer and Virgo and the neighboring Winter Signs Capricorn and Pisces. But a personal birth date and star chart determines how compatible they are to them based on one day.
In mythology, Aquarius is sometimes identified with Ganymede, a beautiful youth in Greek mythology with whom Zeus fell in love and, in the disguise of an eagle, carried off to Olympus to be "cup-bearer" to the gods. Aquarius has also been identified as the pourer of the waters that flooded the Earth in the ancient Greek version of the Great Flood myth. As such, the constellation Eridanus the river is sometimes identified as a river being poured by Aquarius. (With material from: Wikipedia)
Other features of the Aquarius horoscope: