One of the more controversial techniques in the series, Void of Course suffers from its own unclear definition. Before we go into any sort of application, it’s best to get the definitions sorted out first.
The first and most well-known definition is that the Moon is considered Void when it makes no more applying aspects for the duration of its being in a sign. This is relatively more modern and focuses a lot on sign boundaries. It also has the Moon void about every two and a half days as she gets closer to the last few degrees of signs.
The second definition is a more medieval one and takes the focus off of the sign boundaries and focuses on the orb of the planets involved. In this definition, the Moon is considered Void when she separates from one planet and fails to immediately apply to another. This is obviously much more rare and not nearly as regular as the first definition.
The third and oldest definition of Void of course comes from the Hellenistic period. This definition states that the Moon is only Void when she does not aspect another planet for a full 30°. Clearly that is the most rare situation.
Personally, I subscribe to the second definition, so the rest of this article will speak as if that’s the definition being followed.
With the differing definitions out of the way, the next part to consider is what not to do with a chart that has a Void Moon in it (regardless of the definition you subscribe to). The first and most important thing to not do with that chart is to throw it out or consider it unreadable or unreliable in some way. It isn’t. The Void Moon is just telling us something that’s very important, but it isn’t telling us to go away. The second thing you shouldn’t do is give an automatic negative answer to the question.
So what do we do when we have a Void Moon in a horary chart? Typically the Void Moon is an indicator of difficulty in any situation, this can either show as a tangible obstruction to the completion of the question in some way, or can be more intangible in the form of a period of time where little or nothing seems to occur. Obviously neither are particularly positive outcomes, but it makes it easier to understand and work with.
We need to be careful though, because not every Void Moon is really Void, in a sense. Classical authors tell us that the Void Moon isn’t as obstructed when it occurs the signs of the benefic planets: Taurus (Domicile of Venus), Cancer (Exaltation of Jupiter), Sagittarius (Domicile of Jupiter), and Pisces (Domicile of Jupiter, exaltation of Venus); but not Libra (Domicile of Venus, but exaltation of Saturn, so no). Practically speaking, Void Moons that occur in the previously mentioned four signs play out less harmfully in that they usually show periods of time where nothing really happens, and are allowed to complete their next aspect which will be indicative of the event.
Void Moons can also have their obstructive power overcome if the significators are strong, either in their own dignities or in good houses, or both.
The above chart is an example of a medieval Void Moon that is not indicative of a negative answer. Here the querent wishes to know when they will acquire money they are owed due to some tax amendments. The Moon and Jupiter are still too far apart to be within orb of one another so the Moon is Void as there is no one inbetween. However, this merely suggests a waiting period to be served as implied by the question. So while Void, it will conjoin a benefic planet and significator of money to be received. All that’s left to do is just wait for it and find out how much time it will take.
This final example really exemplifies the difference in the technique due to its definitions. Here the Moon would be called Void by most, and it’s true that that is the case. However, the modern definition would claim the Moon is void until she enters Taurus, but the medieval definition suggests that she is only Void until she reaches the orb of the opposition to Mercury. This happens in about 2°.
Aside from the technical difference, this chart was a good example of a Void Moon’s obstacle being overturned by a strong significator. The animals in question are signifed by Jupiter as Lord of the Sixth, and in the chart he is strong in his exaltation and in the first house, so there was no doubt the animals would be returning. Here the Void Moon again acts as a wait period between when the question was asked and when anything could be done about completing it.
Regardless of the definition used, deeper understanding of the technique can assist in ridding it of its bad omen feelings. Yes, Void of Course Moon can be difficult, but it isn’t the be-all-end-all and there are other ways the chart can show positive outcomes.