If you are partial to Astrology as the basis of your decisions, this is typically interpreted as a bad time to begin projects.
Aspects, the relationships between the planets, are used in Astrology to observe paired or grouped influences of the planets. For Example, a relationship drawn between Mars (work, aggression, initiative) and the Moon (intuition, emotion, introspection) shows some connection between a person's inner identity and what he or she does in the world. This can be a strong or a weak aspect, either of which may be fortunate or unfortunate. These distinctions, and the placement of the planets in the signs and whether they are exalted or afflicted there, provide the bulk of data for the interpretive process.
The aspects are drawn on a chart as lines, and are calculated by angle. The strongest aspects are at 0 and 180 degrees: in opposing signs. There are Positive aspects, where the planets work together, indicating that their sign positions are either of the same element (in "Trine") or the same principle character ("sextile"). There are Negative aspects, called Square and Semi-Square, when the elements are incompatible. There are also Weak aspects, which are generally not considered when defining the Moon being Void of Course.
When the Moon is "Void of Course," it means that the Moon does not form any other relationships with the planets until it enters the next sign. If each sign were one round of play, the "void" indicates that the player had finished its turn for that round.
Every planet goes into the void in the same way: when no new aspects are formed until it exits the sign. The Moon tends to be brought into focus on this issue since it moves through the signs more quickly and thus has a better chance to enter the void. Jupiter, for example, moves slowly and some of the planets are bound to form an aspect with it before it moves very far.
Of course it is up to you to determine whether or not this affects your work, occult or otherwise. It is helpful at least to know the nature of the "event" and then to decide if that has any bearing on what you want to do. The idea that one ought to avoid doing anything during this time might have something to do with the idea that new projects are cast into the uncertain future from within the world of ideas, and are thus under the influence of the Moon. New projects depend on making connections, having more going on than just an idea, and having some element that gives them character and direction. Then again, avoiding work or initiative during this time might be only needless delay. It is up to you to decide: it is not written in the stars.
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