Of all the posts on this site, the ones about astrology charts get the most hits. I’m not sure why; I can’t possibly be the first result when someone Googles astrology. But since that seems to be what many people are interested in, I thought I’d write a bit more about it.
An astrology chart is like a fingerprint—it’s unique. Sometimes people ask, “What if two people were born at the same hospital at the same time?” Well, I don’t know. I’ve never seen a case like that. But I think that there’s a lot more to a life than a star chart, so while some of the themes in those two hypothetical lives might be similar, their lives wouldn’t necessarily be the same. If you look at a family—that’s a number of charts interacting in what we call “synastry.” Synastry is a fancy word for taking two people’s charts and comparing them to see how those two people might (or might not) get along. Most people use synastry to look at love relationships, but you can use it between parents and children, between siblings, between coworkers, anyone you might have a personal relationship with.
Synastry is handled in a couple ways. I usually look at the individual charts and see where planets interact, whether one person’s planets fill empty houses in another person’s charts, etc. But there’s also a way to create a composite chart that more or less shows a picture of the potential relationship. I don’t have much experience with these, so I can’t really say much about them. But my understanding is that you read the composite chart in the same way you’d read a natal chart.
Things get complicated when you consider transits and progressions. When you look at the current placement of planets in respect to a person’s chart, you’re looking at transits. If a natal chart is the big picture of a person’s life lessons, their obstacles and advantages, transits are more immediate things happening right now as the planets move. Transits are what daily horoscopes are based on.
Progressions take the planets in the natal chart and, well, progress them. They show where the planets would be now if progressed . . . by various methods*. Progressions can indicate change in a person’s life cycle, as their planets shift and so does their Midheaven and Ascendant. Again, I don’t look at progressed charts very often, but it’s an interesting idea. In fact, even as I write this I find myself thinking I should go look at my progressed chart.
If you’re ever curious about your chart and want to know where to get yours, I generally use astro.com (which is free) but also have on my phone a professional app called TimePassages that works well, too (not free). For the most accurate results, you’ll need to know where and when you were born—not just the date, but the actual time, which is usually on your birth certificate. Or, if you have a mother like mine, she calls you every year on your birthday at the exact time you were born and reminds you of all the pain she went through.
I catch a lot of grief from my scientist friends and religious family members about this stuff. For the record, I find it interesting, but I still firmly believe in our ability to make and change our own circumstances. Your chart is only as important and influential as you allow it to be. Nothing is inevitable. I find looking at my chart sometimes gives me perspective. However, I don’t let it dictate my life. How you handle yours is up to you.
* Methods for determining progressions vary. Some astrologers move each planet forward one degree for each year of the querent’s life (solar arc progression), some do it by moving the chart forward one day for each year (secondary progression). Those are the two most common techniques, but there are others. You can see them on the Wikipedia page for progressions.