"In addition to a zodiac mobile"

The zodiac is a ring of constellations divided into twelve that lay in the heavens on either side to the ecliptic (the path that the Sun appears to trace in the sky each year). The zodiac originates from Babylonian astronomy during the first half of the 1st millennium BC. Whereas the constellations are equally divided into signs in astrology to represent one twelfth of the full path, in reality the physical constellations are different sizes within the ecliptic and are drifting apart; for instance, Virgo takes up five times the ecliptic longitude of Scorpius. The Interntional Astronomical Union defined the modern constellation boundaries of the ecliptic in 1930, which includes a thirteenth constellation, Ophiuchus, between Scorpius and Sagittarius, first identified in Ptolemy's Almagest but not currently widely recognised.