Astrology and Zodiacs

Your zodiac sign corresponds to constellations as they appeared more 2,200 years ago! The science behind astrology may have its roots in astronomy but don’t confuse these two disciplines. Astronomy can explain the position of the stars in the sky but it’s up to you to determine what, if anything, their alignment signifies.

The ecliptic, or the position of the Sun as it’s perceived from the revolving Earth, passes through the constellations that formed the Zodiac – Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces. Zodiac signs were originally determined by which constellation the Sun was “in” on the day you were born.

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.

Around 600 BCE, the zero point was in Aries and was called the “first point of Aries.” (Figure 1) The constellation Aries encompassed the first 30 degrees of the ecliptic; from 30 to 60 degrees was Taurus; from 60 to 90 degrees was Gemini; and so on for all twelve constellations of the Zodiac.

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. 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 star. 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. 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.

Capricorn – Jan 20 to Feb 16
Aquarius – Feb 16 to Mar 11
Pisces – Mar 11 to Apr 18
Aries – Apr 18 to May 13
Taurus – May 13 to Jun 21
Gemini – Jun 21 to Jul 20
Cancer – Jul 20 to Aug 10
Leo – Aug 10 to Sep 16
Virgo – Sep 16 to Oct 30
Libra – Oct 30 to Nov 23
Scorpius – Nov 23 to Nov 29
Ophiuchus – Nov 29 to Dec 17
Sagittarius – Dec 17 to Jan 20

source: http://www.livescience.com

Advertisements