The myth of the cusp is that you are two star signs, instead of just one. *However, it can shift by a day from year to year, and that’s why we have the concept of a “cusp” birthday. The Sun moves into a new zodiac sign every 30 days, on approximately the same date every year. It enters Libra at the Fall Equinox, and it enters Capricorn at the Winter Solstice, or the shortest day of the year. The Sun enters Cancer on the Summer Solstice, the longest day of the year. The Tropical Zodiac begins every year with the Aries pseudo-constellation-or the Aries slice of the zodiac wheel-which is based on the position of the Sun at the Spring Equinox on March 21. The Tropical Zodiac is static and not affected by shifts in the Earth’s axis. Ptolemy used the same names for the zodiac signs as he did for the constellations, which is why there is often confusion around the birth date range. It’s is a fixed system that is not affected by changes in the constellations or the Earth’s axis. In second century Alexandria, the great mathematician and astronomer/astrologer Ptolemy created the Tropical Zodiac. It is calculated by the path of the Sun against the sky, called the ecliptic, as it travels through an imaginary 360-degree circle known as the zodiac. In Western astrology, your star sign dates are calculated we use what’s called the Tropical Zodiac, which is based on the seasons. Pisces Horoscope Dates (February 19 to March 20) The Tropical Zodiac Stars signs based on seasons, not constellations Sagittarius Horoscope Dates (November 22-December 21)Ĭapricorn Horoscope Dates (December 22-January 19)Īquarius Horoscope Dates (January 20 to February 18) Scorpio Horoscope Dates (October 23-November 21) Libra Horoscope Dates (September 23-October 22) Virgo Horoscope Dates (August 23-September 22) If you were born with this date range, you are a member of this zodiac sign.Īlthough the exact dates can shift plus or minus a day, depending on the year, here are the general zodiac sign dates used by Western (or Tropical) astrology: WESTERN ASTROLOGY ZODIAC SIGN DATESĪries Horoscope Dates (March 21-April 19) Your zodiac sign, also known as your Sun sign, is based on a range of dates that lasts about a month. We cultivate excellence, deliver value, enhance education, and engage the public.What are the zodiac sign dates for every star sign? The National Science Foundation (NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science to advance the national health, prosperity, and welfare to secure the national defense."ĪUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media. Observing time on NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Operated under cooperative agreement by Associated Universities, Inc.įounded in 1956, the NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. The National Radio Astronomy Observatory is a facility of the National Science Foundation
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