@zodiacs/engine 1.0.0
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    Variable VOID_OF_COURSE_CONVENTIONConst

    VOID_OF_COURSE_CONVENTION: Readonly<
        {
            aspects: readonly [
                "conjunction",
                "sextile",
                "square",
                "trine",
                "opposition",
            ];
            defaultBodies: VoidBodies;
            name: "last-exact-ptolemaic-aspect-to-sign-exit";
            source: "Lilly, Christian Astrology (1647), p. 112";
        },
    >

    A void period runs from the Moon's last exact aspect in a sign (one of aspects, in ecliptic longitude, to one of the chosen bodies) to its entry into the next sign; with none, from its entry into the sign. No orbs, no latitude, no nodes, angles or points; an aspect perfected in the next sign does not count.