Black Moon Type
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The Black Moon is one of the chart points which can immediately be displayed in any chart or grid – also sometimes known as the Black Moon Lilith. This point is the empty focal point of the Moon’s orbit around the earth, which is also the apogee of the Moon’s orbit.
In the "Preferences" dialog, "Calculations" tab it is possible to select the Black Moon as either the true (osculating) apogee or the mean apogee.
•True Apogee - is the position of the moon's apogee, taking into account short term fluctuations (osculations) in the plane of the moon’s orbit.
•Mean Apogee - is the position of the moon's apogee according to a mathematical formula which ignores many of the minor perturbations in its orbit.
The selected Black Moon type is not saved with a chart - it is only applied when a chart is being calculated.
Note: Other objects called Lilith are also sometimes used in astrology. These are not the same as the Black Moon Lilith. (See How do I display all three Liliths? for more information).