What Is the Astrological Parallel?

In my newsletters, I often refer to parallels happening in the sky, and I usually point out that they are important. I was asked to explain what parallels are.

I will try to write this explanation in such a way that it will be comprehensible for beginners in astrology but at the same time precise enough for more advanced students. I will start from the very basics and then gradually increase the complexity. If at some point you’ll feel that you don’t understand what I am writing, simply stop, as you will already have a decent idea about the subject by then.

Let’s imagine several race cars running around a circular track. Those are planets moving along the ecliptic. Astrology studies this movement of planets, and the patterns they form at specific moments in time. An important part of those patterns are aspects, i.e. interactions between planets.

How can race cars interact? Well, they can overtake each other when they pass the same point along the track. Planets have this kind of interaction too, it is called conjunction. But planets have more options than the cars do. For example, they form an interaction, or aspect, when they are exactly opposite each other along the ecliptic, i.e. the angular distance between them is 180º. This is called an opposition. Or when the angular distance between them is 120º, this is a trine. There are several other aspects as well, square (90º) and sextile (60º) being the most notable.

Aspects like these are widely known and used by students of astrology. When an astrological software outputs a natal chart (a snapshot of the sky at the moment of birth), these aspects are usually depicted in bright colours, and are clearly visible. Have you noticed that I never mentioned the parallel so far? Even though it’s an aspect too.

Some software, like Solar Fire, can display parallels in the chart, but you need to ask it to do that in the settings. Quite commonly though, parallels are forgotten nowadays. I think the main reason for this forgetfulness is the fact that they aren’t clearly visible in the chart. Earlier sources of astrological knowledge (before astrology in the West was reduced to ashes by the fans of materialism), like reasonably well known William Lilly and many of much less known but very bright minds before him, do state that parallel is at least as potent as the strongest of common aspects, the conjunction.
It isn’t easily distinguishable visually, that’s the problem. And the contemporary students of astrology do not bother to dig just a little bit deeper. So what are exactly those mysterious parallels?

Let’s return to our racing cars. Let’s say the race track is 40 meters wide, and it has a center line clearly marked on it. Let’s say one of the cars, car A, is currently exactly 20.0 meters to the left of the center line, and another car, car B, is also exactly 20.0 meters to the left of the center line. No matter where they are located along the track. If they were not cars but planets then according to the rules of the traditional astrology they would be in the aspect of parallel. Can you see what’s the essence? They are moving at the same distance from the center line, and so it doesn’t matter where they are along the track — they are connected!

So the main reason why parallels are forgotten in contemporary astrology is that they are measured in the direction perpendicular to the printed natal chart. That chart is 2D whereas parallels are measured in the 3rd dimension.

Are you still with me? If yes then I guess you are waiting for a technical definition of astrological parallels, without flimsy allegories. Well, I am more than happy to help you out. However, I will use this opportunity to promote my other pieces of writing, partially because, according to my observations, many of even otherwise competent students of astrology neglect the basics of astronomy. Despite what current astronomers say, astronomy was traditionally the servant of astrology, and its only raison d’être was to serve precise enough data to astrologers.

First of all, do you know what the ecliptic is? If you don’t, or if you are unsure, please read this post.

Next, do you know what’s the relationship between the ecliptic and the celestial equator? If you don’t, or if you are unsure, please read this post.

I would also advise you to read this post, as it brings both important concepts together.

Are you still with me? Fantastic! Now that you understand that the Sun is sometimes further from the celestial equator (like at the times of summer and winter solstices) and at times it’s spot on the equator (like at the times of spring and autumn equinoxes), you can understand the idea of the Sun’s distance from the equator. It’s at its maximum (about 23º) at the solstices, and it is zero at equinoxes. This distance is called the declination. And why is it important for us? Because the aspect of parallel is formed by two planets having an equal declination.

Declination is measured in the direction more or less perpendicular to the direction of the ecliptic, this is why you can’t see it on the common astrological charts, which are 2D. Magi Society has devised a chart showing the third dimension, but that’s a topic for a different discussion.

Declination is measured in two directions, it can be towards the North Pole (in which case it is considered to be positive, or simply North), or towards the South Pole (when it’s negative, or South). So parallel occurs when both planets are equidistant from the equator in the same direction (both are North, or both are South). And what if they are equidistant from the equator in the opposite directions (one is North, the other is South)? Then that’s the aspect of contra-parallel! Which in tradition was considered to be similar to an opposition, but Magi Society believes it’s pretty much the same as the parallel.

I can’t believe you are still with me, but if you are — I love you! Now you might be asking: how do I know if there is a parallel in the sky? Well, many software packages, first of all my favourite trusty Solar Fire, will tell you that. But if you are still using ephemeris, like myself, there are some of them that do show declinations, Raphael’s ephemeris is one example.

Now that I told you all that, and you are still with me (the probability of which is very close to zero), I can tell you that the parallel I told you about is the most popular kind of parallel but not the only one. That is the parallel in declination. There is also the parallel in latitude. I mean the ecliptic latitude.

See, the planets’ positions we are used to in astrology are measured in ecliptic longitude (their distance from the zero point, the point of the vernal equinox, in degrees and minutes) but usually expressed in the signs of the zodiac. Still, bearing in mind that each of the signs of the zodiac occupies 30º of the ecliptic, a planet’s position in the zodiacal notation can be easily converted to its ecliptic longitude. For example, if the Sun is located at 11º 30’ of Leo, since Leo is the fifth sign of the zodiac, its ecliptic longitude is 131º 30’. Easy enough.

Now, there is also such a thing as the ecliptic latitude — it’s the distance of a planet from the ecliptic. The ecliptic latitude of the Sun is always zero by definition (since the ecliptic, as you remember, is the path of the Sun among the stars). However, other planets do have some ecliptic latitude, and some of them, like Pluto, can wander quite far from the ecliptic. So if two planets have an equal ecliptic latitude, they are considered to be in the parallel in ecliptic latitude. They can also be in a contra-parallel, if they are equidistant from the ecliptic in different directions. But a parallel in ecliptic latitude is seldom, if ever, used in astrology. Whenever you hear of a parallel, that’s a parallel in declination, for sure.

Phew! By now, I am sure that nobody is reading my musings, so it doesn’t really matter how I close off this post. So I will simply go and have some deserved rest :)


  1. I actually read and understood all of it :) Thank you. I use a lot of things in my astrological analyses, and I knew about declination and latitude. But I've never studied those aspects up until now.

  2. Ha! I read through it all and now understand what I have been missing about the chart data that I have been staring at for the last few years. Thank you Alexander.

  3. What orb is used to calculate parallels?

    1. Usually 1 degree, although Magi Society stated they were using 1.2º, in one of their books.

  4. Thank you so much for this useful article and easy to "digest" explanation!! I'm fairly new to astrology (discovered the fact that there's more to it than just a sun sign only last summer) and I find your blog very helpful in my studies :) I do have a question about using parallel in interpreting natal charts - is it treated exactly the same as a conjunction? Also, does it apply to fictitious points like the Node, Asc, MC, etc? Thank you

    1. Yes, in the traditional astrology parallel is treated like a conjunction and contra-parallel like an opposition but this is a little bit tricky as planets in parallel can be in different houses. Yes, you can use parallels to Asc, MC and other points, but how do you define their declination? The answer is: take the declination of the Sun when it is passing through Asc, MC, etc.

  5. Special thanks to you with your hard work .Keep it on.
    From Christian Abraham, Nigeria.

  6. Ok, so how do we INTERPRET a Parallel? Do we read it like a conjunction?

    1. Tradition says it is similar to conjunction, but you need to take into account that the planets can be in different houses, so it's a little bit more complex in interpretation. It is also stronger than conjunction, in my opinion, as it takes more time to form and dissolve.

  7. Fascinating - and completely obvious now that you have pointed it out to me. An excellent description that allows me to visualize sympathetic vibratory relationships that I had not previously been aware of. Thank you for enlightening me.

    1. I am very happy that I could be of help!

    2. Hi Alexander . Thanks so much for your Micro Lessons. I am appreciating them. I gave Mercury RX a shove a few hours prior to the parallel. A few days later obvious signs of Mercury improving. I lived in the North Queensland Australian outback for 30 years and carefully noted the journey of the Sun. Astrology is one of my passions with TaiChi over that period of time. Julie M Hutchin

    3. Thank you for this fascinating article. I enjoyed it. The previous Mercury RX parallel was given a shove a few hours prior. It worked. I am enjoying your site. Thanks so much. After 40 years of Astrology and TaiChi i love learning. Thankyou. Julie

    4. You are awesome, Alexander! Thanks so much for explaining so clearly.

  8. Dear Alexander,
    I'm taking your Udemy course and I'm fascinated with astrology.
    Your way of explanation is very concise and clear!!! Warm Brazillian regards.

    I don't know if there is anything about parallels on the course but are you going to explain something about it in the course?
    Do you talk about parallels interpretation there?

    Also, I use a Mac Book and I cannot instal solar fire. Is there any other software for that?

    Thank you a lot!!!!!!!!


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