How The Zodiac Sign Is Decided

Early astronomers witnessed the Sun passing through the Zodiac signs in a year’s time, spending roughly a month in each. As a result, they determined that each constellation covers 30 degrees of the ecliptic.

However, due to a phenomenon known as precession, the positions of the constellations we see now have changed.

The zero point of the Zodiac used to designate the beginning day of spring in the Northern Hemisphere. The vernal equinox happens when the ecliptic and celestial equator collide, according to astronomers.

The zero point existed in Aries around 600 BCE, and it was known as the “first point of Aries.” (See Figure 1). The constellation Aries covered the first 30 degrees of the ecliptic; Taurus covered the next 30 degrees; Gemini covered the next 60 degrees; and so on for all twelve constellations of the Zodiac.

The Earth wobbles around its axis in a 25,800-year cycle, which ancient astrologers were unaware of. The gravitational attraction of the Moon on Earth’s equatorial bulge causes this wobble, known as precession.

This wobble has led the junction point between the celestial equator and the ecliptic to migrate west along the ecliptic by 36 degrees, or nearly one-tenth of the way around, over the past two and a half millennia. This indicates that, in relation to the stars beyond, the signs have moved one-tenthor almost a month around the sky to the west.

For example, persons born between March 21 and April 19 are considered Aries. During much of that time, the Sun was no longer in the constellation of Aries. The Sun is actually in the constellation of Pisces from March 11 to April 18! (See Illustration 2) See also Figure 3, which depicts the equinox precession from 600 BCE to 2600 CE.

The dates when the Sun is truly within the astronomical constellations of the Zodiac, as defined by contemporary constellation borders and corrected for precession, are listed in the table below (these dates can vary a day from year to year).

When precession is taken into consideration, your zodiac sign will most likely be different. And if you were born between November 29 and December 17, your zodiac sign is one you’ve never heard of before: Ophiuchus! After Scorpius, the eliptic crosses across the constellation of Ophiuchus.

Visit the Birthday Sky program to view what the sky looked like on your birthday and to learn more about your “true zodiac sign.”

Constellations Image Gallery

In India, how are zodiac signs determined?

Because Indians subtract 23 degrees from a constellation’s visible position, there is a 23-day difference between sun signs in the western and desi zodiacs. “If someone is born on March 24, his Vedic sun sign is Pisces, whereas his Western sun sign is Aries,” Bhambi explains.

What is the origin of the zodiac sign?

Astrology is the study of celestial bodies’ movements and relative placements, which are thought to have an impact on human affairs and the natural world. The 12 zodiac signs, one of the earliest notions of astrology, were devised by the Babylonians around 1894 BC.

Who decided on the characteristics of each zodiac sign?

Around 1500 BC, the Babylonians developed the first set of 12 zodiac signs. So it’s been more than 3,000 years. Did you realize it was so old? They knew the Sun returned to its original position every 12 lunar cycles (months). They then picked 12 constellations that they noticed were associated with the seasons. They also gave them names that are very close to the ones we use now for the zodiac signs.

Is there a Hindu horoscope?

You may identify your zodiac sign based on Indian astrology readings if you only know your date of birth. Here’s how to figure out what your zodiac sign is. Mesh is your zodiac sign (Aries). Your zodiac sign is Ram, your element is fire, and Mars is your ruling planet.

Is astrology a reliable source of information?

Astrology is a collection of belief systems that assert that there is a connection between astrological phenomena and events or personality traits in the human world. The scientific community has dismissed astrology as having no explanatory power for describing the universe. Scientific testing has discovered no evidence to back up the astrological traditions’ premises or alleged effects.

Who invented the zodiac?

According to NASA, the Babylonians had already constructed a 12-month calendar based on the phases of the moon when they created the zodiac. Despite the fact that they identified 13 constellations that make up the zodiac, they decided to leave one out so that the zodiac signs would coincide better with their 12-month calendar.

But, before all of you Aries, Cancers, and Leos start making fun of your new Ophiuchus friends, keep in mind that the addition of this 13th constellation shifts every zodiac sign’s time frame slightly, which means that, while I’ve loved my life as a textbook Pisces, I discovered that I’m now an Aquarius after doing my research. (Gasp!)

Although 3,000 years old, this information reappeared this year when NASA disclosed scientific data regarding the Earth’s axis, which has moved and no longer points in the exact same direction as it previously did, affecting the amount of time each constellation is visible in the sky.

The astrology community (and Twitter) went crazy, and many ardent followers assumed NASA was involved “added a sign to the zodiac, causing havoc with the signs we’re all familiar with. That, however, is not the case. NASA omitted an astrological symbol from the design. They wrote a Tumblr blog entry about it “I’ve just done the math. If you want to point the finger, it should go to the ancient Babylonians for leaving Ophiuchus out of the picture in the first place.

Which zodiac sign has the most intelligence?

Aquarius is the zodiac sign with the highest intelligence. Uranus, the planet of invention, creativity, and expanded consciousness, rules them. As a result, this air sign does more than just process information and spit it back out: they evaluate, comprehend, and expand on it. “They’re creative, unconventional, and frequently ahead of their time,” Kovach adds. “They have a good understanding of how upcoming trends work and may have a picture of the future that others don’t.”