The first day of spring in the Northern Hemisphere was once marked by the zero point of the Zodiac. Astronomers call this the vernal equinox and it occurs as the ecliptic and celestial equator intersect on approximately March Around B.
- Spring Equinox March 20, 12222.
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Unbeknownst to the ancient astrologers, Earth continually wobbles around its axis in a 25,year cycle. This wobble — called precession — is caused by the gravitational attraction of the moon on Earth's equatorial bulge. Over the past two-and-a-half millennia, this wobble has caused the intersection point between the celestial equator and the ecliptic to move west along the ecliptic by 36 degrees, or almost exactly one-tenth of the way around, to the border of Pisces and Aquarius.
This means that the signs have slipped one-tenth — or almost one whole month — of the way around the sky to the west, relative to the stars beyond. For instance, those born between March 21 and April 19 consider themselves to be Aries. Today, the sun is no longer within the constellation of Aries during much of that period. From March 11 to April 18, the sun is actually in the constellation of Pisces! The table below lists the dates when the sun is actually within the astronomical constellations of the Zodiac, according to modern constellation boundaries and corrected for precession these dates can vary a day from year to year.
And if you were born between November 29 and December 17, your sign is actually one you never saw in the newspaper: you are an Ophiuchus!
The eliptic passes through the constellation of Ophiuchus after Scorpius. Have a news tip, correction or comment?
Let us know at community space. Figure 1.
The vernal equinox marks the first day of spring and occurs at the intersection of the ecliptic and the celestial equator. The vernal equinox also marks the zero point of the Zodiac.
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It's a great conversation starter: "What's your sign? Precession and Astrology The first day of spring in the Northern Hemisphere was once marked by the zero point of the Zodiac. The dates will progress by an increment of one day every The corresponding tropical and sidereal dates are given as well. From Wikipedia, the free encyclopedia. This article has multiple issues. Please help improve it or discuss these issues on the talk page. Learn how and when to remove these template messages. This article may require cleanup to meet Wikipedia's quality standards.
The specific problem is: Article needs to distinguish clearly between different types of sidereal astrology. See talk page Please help improve this article if you can. July Learn how and when to remove this template message. This article needs additional citations for verification.
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Further information: Jyotisha. Main articles: Ecliptic and Zodiac. Astrology Bobbs-Merrill Company. Categories : Astrology by type Hindu astrology History of astrology.