So, you know how sometimes you just get this bug in your head? For me, it was horoscopes. Not that I’m a huge believer, or really, I wasn’t. But I kept seeing these things, you know? Like, “This week, Pisceans will face a challenge in communication,” or whatever. And some days, it just felt right, even if it was super vague. Other times, it was total nonsense. I started thinking, how do they even do that? Is it just a shot in the dark, or is there some actual system behind it?
I figured, what the heck, I’m gonna try and build something that kinda, sorta, maybe spits out a weekly ‘vibe’ report, based on actual planetary stuff. Not a full horoscope, mind you, that’s way too deep. But just to see if I could even get the basics working. I wanted to map out some planetary positions and see what kind of energy they’d be throwing around for a particular time. You know, a personal little project.
First thing I did was just start reading everything I could get my hands on. Online articles, forums, even dusted off an old astrology book my aunt had lying around. Man, it’s a rabbit hole. Houses, aspects, transits, retrogrades – my head was spinning. I realized pretty quick that it wasn’t just about your sun sign. There’s your moon, your rising sign, all these planets zooming around in different parts of your birth chart. It’s personalized, which actually made it way more interesting.
I decided to keep it simple. My goal was to plot the positions of the main planets for a given week and then try to see how they interacted with a fixed “natal chart” – basically, my own birth chart, or maybe a hypothetical one to test with. I wanted to focus on transits, which is just where the planets are now compared to where they were when you were born. That’s usually what drives those daily or weekly predictions, right?

I picked Python for this. Seemed like the easiest way to script something without getting bogged down in too much boilerplate. The next big hurdle was getting the actual astronomical data. Where do these astrologers get the precise positions of Mars on a Tuesday at 3 PM? Turns out, there are these things called ephemerides, which are tables of planetary positions. Finding a good, free, and easy-to-use one that I could integrate with code was a challenge. I bounced between a few different libraries and databases, some were too complex, some were missing data. It was a proper hunt.
The Nitty-Gritty Details and Headaches
- Getting the Right Tools: I finally landed on a Python library that could calculate planetary positions based on specific dates and times. It wasn’t perfect, and the documentation was sparse, but it worked. I had to learn how to feed it latitudes, longitudes, and time zones, which sounds simple but was a huge pain. One tiny mistake and Mars would be in a completely different sign.
- The Math Mess: Oh boy, the math. Astrological calculations aren’t just plug-and-play. You have to deal with different coordinate systems, sidereal time, tropical zodiacs… I just wanted to get a general idea, but to even get that, I had to understand how to convert Greenwich Mean Sidereal Time to Local Sidereal Time for my location. My brain felt like it was doing gymnastics. I spent a good few evenings just staring at formulas, trying to translate them into Python logic.
- Defining “Aspects”: This was crucial. Aspects are the angles between planets. A 90-degree angle (a “square”) is usually challenging, while a 120-degree angle (a “trine”) is harmonious. I had to write functions to check all these angles, factor in orbs (a few degrees of leeway), and then assign some kind of “meaning” to them. That’s where it got really fuzzy. What does “Mars square Jupiter” actually mean in practical terms for a week? That’s the art, not the science. I just had to pick some basic interpretations based on my reading.
- The “Weekly” Part: To make it weekly, I decided to run the calculations for seven consecutive days, maybe focusing on the strongest transiting aspects on each day and then summarizing them. It was a brute force method, really. I’d pick a starting date, iterate through the next seven days, calculate planet positions for each, compare them to a natal chart, identify significant aspects, and then spit out a simple list.
My first successful run was kinda lame. It just spat out a bunch of numbers. Like, “Sun at 10 degrees Aries, Moon at 22 degrees Libra.” Not very insightful. So, I started adding more logic. If the Moon was in my “5th house” (house of creativity and fun) and making a trine to Jupiter (planet of expansion and luck), I’d try to code it to say something like, “Good week for creative projects.” It was super simplistic, almost comical.
I remember one night, after hours of messing with time zones and aspect orbs, I finally got it to print out a basic “weekly outlook” for a friend. It said something like, “Expect mild social interactions due to Venus aspects.” My friend laughed, “Sounds about right for my quiet life!” It wasn’t profound, but it worked. It pulled the data, did the math, and gave an interpretation. It was a small win, but it felt huge.
What I learned from this whole thing is that while the math for tracking planets is pretty straightforward once you get the hang of it, the interpretation is where all the real work happens. You can code the positions and the angles, but turning “Moon square Saturn” into “This week, you might feel some emotional restrictions, but it’s a good time to work on discipline” – that’s a whole different ballgame. It’s more art than algorithm. My little script was a rough sketch, barely scratching the surface, but it definitely showed me there’s a method to the madness, even if my version was super crude.
