to those planets that are above and those that are below and Kugler correctly guessed that the reference point was earth itself but mostly the planets were spoken of in the framework of astronomical texts dealing with mule mule a term that kept the scholars guessing in the absence of a better solution most scholars have agreed that the term mule mule stood for the Pleiades a cluster of stars in the zodiacal constellation of Taurus and the one through which the axis of the spring equinox passed as viewed from Babylon