If you're into astrology, you've undoubtedly mapped your birth chart, downloaded various apps, and maybe even looked up your astrological compatibility with a love interest. But did you know Western astrology isn't the only astrological system out there?

Here's your introduction to Vedic astrology (warning: it might shake up the way you read your horoscope).

The Sanskrit word for Vedic astrology, or Hindu astrology, is jyotiṣa, loosely translating to "light/heavenly body," and the modality seems to have first appeared in the Rigveda, an ancient Indian text (though some assert it's been around since 10,000 B.C.).

"Vedic astrology contains within it the rich spiritual traditions and myths of ancient Indian culture," explains founder of Moondance Vedic Astrology and author of Vedic Astrology for Beginners, Pamela McDonough. "Even today, throughout much of India, Jyotish is an accepted science and, for many, is part of their lifestyle."

In its earliest days, Vedic astrology was used to determine important dates for sacrifices and rituals. Over time it became increasingly personalized; people started studying its planetary movements in an effort to understand their own destiny.

It's related to other ancient Indian practices including yoga and Ayurveda, and similar to Western astrology, it "offers us a guide or road map to a better understanding of our physical, emotional, spiritual, and even monetary experiences," McDonough says.

Just like in Western astrology, there are 12 signs in the Vedic zodiac. And interestingly, the characteristics of the signs are pretty much the same, too. The difference lies in the dates.

So, if you swear by the identity prescribed by your Western sun sign, prepare to have your boat rocked a little. The Vedic sign dates are as follows and you can calculate your complete Vedic chart here:

As McDonough explains, Western astrology bases charts on the "tropical calendar" (which most of the world uses) and the four seasons, while Vedic astrology charts are calculated using something called the sidereal system, which looks at the changing, observable constellations. (Western astrology does not change in the same way and works with the planets' fixed positions.)

Another interesting distinction is that modern Western astrology has become more psychologically oriented, where Vedic astrology is based upon one's individual karma, according to McDonough.

Vedic astrology also tends to provide insight into personal dharma, or life path, and reveal our innate gifts and challenges. "It can help us better understand our relationships with our family, friends, and life partners. Having this fundamental understanding really helps to ease and relieve stress and our emotional ups and downs," she says.

The two modalities also have a different take on what a retrograde planet actually means and what some of the planetary aspects represent.

"All planets in Western astrology share the same type of aspect, such as a square, trine, sextile, or opposition," McDonough notes. "Vedic astrology utilizes special aspects—each planet has a specific aspect or set of aspects, along with different strengths that are applied to that specific aspect."

Vedic astrology also considers your rising sign to be more important than your sun sign.

If you're already up to speed on Western astrology (and if you're not, might we suggest the AstroTwins' Astrology Fundamentals class on mbg?), Vedic astrology might be another modality to add to your repertoire.