In Western astrology, astrological signs are the twelve 30° sectors of the ecliptic, starting at the vernal equinox, also known as the First Point of Aries. The order of the astrological signs is Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. Each sector was named for a constellation within it in the time of naming. These divisions were also used in scientific astronomy until the 19th century in some cases; see ecliptic coordinates.