The Procession of the Equinoxes

Posted: September 23, 2016 in End of Religion, The Birth of Jesus Christ
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I tripped over an article on the Internet today about NASA “changing/updating” the astrological signs, and of course, after I clicked on it to read it, up popped an additional article by attempting to debunk the NASA claim. Ironically, the Snopes article pre-dates the other article, and is apparently based on previously published but essentially identical information.

Understanding the accurate birth date of Jesus Christ requires an accurate understanding of both astronomy and astrology—or more precisely, archeo-astronomy—what ancient cultures knew and believed about astronomy and astrology. And although as a Christian, I do not believe in or endorse horoscopes, the basic premise behind these articles is actually rooted and grounded in sound astronomical observation and does have bearing on our understanding of precisely when Jesus was born.

What both articles clumsily refer to is called the procession of the equinoxes, and it is well-known and understood by both ancient and modern astronomers and astrologers alike. As a matter of fact, understanding the procession of the equinoxes is how the ancient Mayans developed a calendar that “ended” on the winter solstice (December 21) 2012, that caused such a hullabaloo few years ago.

The procession of the equinoxes occurs because the Earth’s rotational axis is actually tilted off its orbital axis by approximately 23º. (Ironically, the axial tilt, or “obliquity” also oscillates over time between approximately 21º and 24º.) Because of the axial tilt, the celestial North Pole (the point or spot drawn in the heavens directly above the Earth’s rotational axis, combined with the Earth’s orbit, and the rotation of the Milky Way galaxy, causes this spot to draw a circle in the heavens. The time it takes to draw a full circle is approximately 25,920 years and is known in astronomical communities as the “Great Year” or “Platonic Year.”

The combination of these various orbits and rotations results in the constellations appearing to rotate around the Earth despite the fact that they appear stationary to the naked eye, repeatedly showing up in the same location seasonally each year. The key component however is that this happens very, very slowly and is not observable to the naked eye. It is only noticeable due to prolonged observation and recording of the precise position of the constellations against our sun. By tracking exactly what date each constellation rises behind the rising sun on the vernal equinox (over many, many years), we discover that the constellations rotate approximately 1º every 72 years.

The reason this matters, for those who put any credibility in horoscopes anyway, is that for many followers of such practices, the star charts they are using are up to 2000 years old, during which time the constellations have shifted about 27º, which means the dates for what sign occurs when have changed too.

You see, the “sign” one is “born under” is determined by the position of the sun (what constellation it is in) on the day you were born—not by the date on some chart that says “Pisces” (for example) is between February 19 and March 20. Where these articles got it right (even though they themselves were highly skeptical) is that due to the procession of the equinoxes, those dates are now Aquarius, and March 11 to April 18 is now Pisces. Enter your birthdate into any simple astronomy software and check for yourself. My birthdate is October 18, 1961. Although I never followed horoscopes, I grew up with the understanding that I was either a Scorpio or a Libra, when in reality I am a Virgo! Horoscopic interpretations aside, the dates are purely scientific.

What’s truly amazing however is how ancient societies who were limited to physical observation combined with rudimentary mathematical extrapolation could know about the Great Year.

The end result is that archeo-astronomy, or, what ancient cultures knew and believed about astronomy and astrology plays a major role in our understanding of the accurate birth date of Jesus Christ.

Such massive strides have been made over the past 50 years in the field of archeo-astronomy, that historians now recognize that if one does not understand the astronomy of that culture, you probably do not understand that culture as well as you think you do.

This means we will be taking a long look at Hebrew archeo-astronomy.

More to come.


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