The Zodiac Crimes Robin deduce that he is plotting to commit twelve crimes based loosely on astrological signs of the zodiac and that he committed the first Zodiac Crime already by stealing the rare art map, whose initials stand for the sign of the Ram (Aries). Meanwhile, back at his hideout Joker clues the recently arrived (rather, packaged and shipped) Penguin into his astrological plan. He then gives a false clue to Batman and Robin to the effect that "Taurus the Bull is next on my show", and "You'll be singing a song of woe!" Batman and Robin deduce that Joker was telling
Zodiac the circle of background constellations over time. The principle of the vernal point acting as the first degree of the zodiac for Greek astronomers is also described in the 1st century BC astronomical text of Geminus of Rhodes. Geminus explains that Greek astronomers of his era associate the first degrees of the zodiac signs with the two solstices and the two equinoxes, in contrast to the older Chaldean (Babylonian) system, which placed these points within the zodiac signs. This illustrates that Ptolemy merely clarified the convention of Greek astronomers and did not originate the principle of the tropical zodiac, as