To create your free synastry chart enter two names, places of birth (or nearest city), and dates of birth below. Entering a birth time is optional, but including it will provide a more accurate birth chart. When a time isn't provided, the time defaults to noon.

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• Create a Free Synastry Chart. To create your free synastry chart enter two names, places of birth (or nearest city), and dates of birth below. Entering a birth time is optional, but including it will provide a more accurate birth chart. When a time isn't provided, the time defaults to noon.

Think of a map of the cosmos that is a snapshot of the exact planetary coordinates of when you were born. Now when we overlay another individuals map over your map, we can visually see where their planets were located in relations to yours - that is the basis of a synastry chart. Basically it is overlaying two individual’s birth charts and examining the aspects between the two charts.

Visually a synastry chart looks exactly like a birth chart - a 360 degree wheel divided into 12 sections. The only difference being that there are twice as many elements being charted. In a synastry chart, an aspect is the geometric relationship between the two sets of planets. An example of an aspect shape includes a square, trine, conjunction, and more. Each aspect shape produces a different meaning.

Synastry charts and composite charts are similar in that they both explore relationships. Synastry charts are used to examine relationships between two people, more specifically, how they may effect one another individually. From that an astrologer can use the chart to interpret the character and dynamic of the relationship.

Insight map creator automatically creates the at5 files the Lowrance unit uses. There are a number of hoops you have to jump thru, but once you figure it out, it’s just time consuming, especially for the high zoom photos. To get oriented, watch the YouTube video on making your own Lowrance HDS maps by Brian O’Dell.

Modern & accurate

Astro-Charts was created to usher in fresh and fun energy to astrology on the internet. Our synastry charts balance a modern look combined with up-to-date and accurate data from planetary databases created by NASA. We do all the calculations for your synastry chart and handle daylight savings and other nuanced location situations.

Save unlimited charts

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Save all your birth, synastry, and composite charts on Astro-Charts for free. Easily access all your saved charts and never worry about running out of space.

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Customize your chart

We give you the power to customize synastry chart to your liking: custom orb limits, multiple house systems, sidereal calculation, declinations, show/hide any planet, asteroids, or aspect. We also are open to suggestion for more features that you may find useful.