This incomprehension was a reason why the ephemerides of two different Light Moons (Selena with its cycle of 7 years precisely and Arta with its cycle of 6 years 11 months and 5 days) appeared in 1985-1988, at the initial period of the Avestan School of Astrology (AShA, which was established a few years earlier). These tables were obtained empirically or, to be exact, by statistical analysis of the Light Moon's positions which were placed in a few dozens of horoscopes by Pavel Globa just on a basis of his intuition. One of the authors of the above-mentioned ephemerides (and one of the nearest Globa's disciples until now) told me that the found succession didn't arrange in a linear dependence (what is not amazing because the nature of the Light Moon is too complicated; it can not be described by a linear formula), but it was "good enough" to be arranged in two linear dependences. Thus the consequence about existence of two Light Moons was made. This opinion -- never declared before -- quickly surfaced and spread in astrological circles, which are so sensitive to any extraordinary currents; and the legend about two (or even more, in some astrologers' minds) Light Moons ran and ran until today. Let's note that the arising of this myth is a result of a totally wrong notion of the Light Moon as a point which has a simple constant movement along the ecliptic. The real Light Moon's movement is much more interesting and complicated. It is not simpler then, for instance, the movement of the Lunar Node or the Dark Moon (the true apogee of the lunar orbit). But it was not taken into account at that time, and usually it is not considered now.