![]() Precession has also had the effect of shifting the equinoxes of Earth - the two points of the year at which day and night have equal lengths - along the ecliptic. Over the last 2,500 years, the intersection of the celestial equator and the ecliptic has drifted west along the ecliptic by 36 degrees - about one-tenth of its length.Īn illustration showing Earth's wobble along its rotational axis. This means that the North Pole isn't always pointing in the same direction as the background stars of the celestial sphere, and this effect accumulates. Watching this pole over the course of 25,800 years, we would see it trace out a circle over the Earth. To picture this precession, imagine a literal pole extending out of Earth at the North Pole. Known as precession this 'wobble' has a 25,800-year cycle. ![]() The gravity of the moon and the sun, and to a lesser extent the planets, acts on Earth's equatorial bulge - caused by the planet's rotation - to shift its axis of rotation. The cause of the shifting in zodiac signs is precession, the slight 'wobble' Earth experiences as it orbits the sun. The problem was, that these ancient astrologers weren't aware of a ' wobble' in Earth's motion that would seriously disrupt their system as time progressed. The other astrological signs of the zodiac were categorized in a similar way, each grabbing its own 30-degree slice of the ecliptic. This intersection is also known as the vernal equinox and the spring equinox in the Northern Hemisphere because it is considered the first day of spring.Ģ,200 years ago this zero point occurred in Aries, hence its name the "first point of Aries." As a result, Aries the constellation occupied the first 30 degrees of the ecliptic from 30 to 60 degrees was taken by Taurus, and Gemini was positioned from 60 to 90 degrees. The zodiac was initially developed around 600 BCE and its zero point was defined as the point that the ecliptic intersected with the celestial equator - the great circle of the terrestrial equator on the celestial sphere. (Image credit: Wikimedia commons/Tauʻolunga) ![]() Whether you want to dive in or just skim the basics, this overview of zodiac-sign traits can help you do some self-reflection and maybe even learn a bit more about yourself.An illustration of the sun's motion relative to Earth throughout the year as it crosses in front of constellations representing the astrological signs of the zodiac. Here, you'll learn all the important zodiac facts, including your zodiac-sign element, the symbol and planet associated with your sign, and the astrological house your sign rules. For example, in addition to a sun sign, you also have a moon sign, the parts of you which live beneath the surface and turn inward, and a rising sign, the parts that you share outwardly.Īs we go through some interesting facts about each zodiac sign, remember that it's just one of the many facets of your full birth chart. Some people don't relate to their zodiac sign's traits quite as much as others, and this can be because there's just so much more to astrology than your sun sign. It's what we're referring to when we say "zodiac sign" and what someone means when they ask what your sign is. ![]() Have you ever wondered what someone's really implying when they say "omg, you're such an Aries"? Curious why people's dating app profiles are filled with anti- Scorpio jokes? Want to dig a little deeper into what it really means to be a Gemini? It all starts with learning about your sun sign.Īccording to western astrology, your sun sign represents the core values of who you are.
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