If you have your birth certificate on hand, it’ll be easier to get precise information there. Gathering information for the other person’s chart may be trickier, depending, but you can ask them to check their birth certificate if they’re not sure of something. If more specific information isn’t available, you can still learn a lot from just a date of birth. A person’s Sun, Mars, and Venus signs are determined based on birthday alone, and all are vital for reading compatibility!
While you can learn the complicated process of calculating an astrology chart by hand, it’s much easier to let an online calculator do the work.
On synastry charts, the inner ring of the synastry chart reflects one person’s signs and planets, and the outer circle shows how the other person’s planets match up. Synastry charts can be pretty complicated, but sites like https://astro-charts. com/tools/new/synastry/ can calculate the chart for you.
There are 10 planets total in astrology, divided into “inner” and “outer” planets. The Sun, Moon, Mercury, Venus, and Mars are inner planets ruling personality and daily life. Zodiac signs connected to these planets are the ones you’ll look at most for compatibility. Jupiter, Saturn, Uranus, Neptune, and Pluto are outer planets ruling more significant trends and even whole generations. Generally, the outer planets are less critical when considering compatibility. [2] X Research source
The key aspects in astrology are conjunctions, sextiles, trines, oppositions, and squares. [4] X Research source
Pisces is three signs away from Sagittarius on the zodiac. Therefore, if your Moon is in Pisces and your crush’s Sun is in Sagittarius, they form a square aspect. Aries is opposite Libra on the zodiac wheel; therefore, a Mercury in Aries and a Venus in Libra form an opposition.
Leo and Gemini are two signs apart, forming a comfortable and easy connection. If your Sun is in Leo and theirs is in Gemini, your Suns are sextile. Trines are essentially formed by different signs of the same element. If your Sun sign is in Sagittarius and your crush’s Sun is in Aries, they form a trine aspect.
For example, if you and your crush both have Capricorn Suns, it means they’re conjunct. That’s also a soft (positive) aspect to have since it means you’ll relate to one another on a fundamental level.
For instance, if both birth charts both have a lot of water signs (those being Pisces, Cancer, and Scorpio), then it’s fair to say you and your crush have a lot in common. Signs of the same element form trines and conjunctions! Earth and water signs are complementary, as are air and fire. In terms of aspects, that’s why all sextiles are fire/air and earth/water pairings. If you have lots of fire signs in your birth chart and your crush has lots of air signs, you’ll get along like a house on fire!
For example, Suns in Taurus and Cancer are compatible because they’re complementary elements and sextile to each other. It’s easy to compare Sun signs, but your personality goes deeper than that. If your Sun signs aren’t compatible, do some digging; there’s likely compatibility elsewhere in your birth charts.
For example: even if you compare two charts and find squares or oppositions in most aspects, but discover a trine in your Venus and sextile Moons, that’s an overall positive reading. While square aspects mean tension, knowing where that tension can occur in theory will help you work through it in reality. Opposing aspects mean you may have to put effort into understanding one another, but remember that opposites also attract big time!
