Planet Nine can deliver eTNOs into orbits roughly perpendicular to the ecliptic. The constellations along the ecliptic are called the zodiac. This three-dimensional movement is known as "precession of the ecliptic" or "planetary precession". The signs approximately corresponded to the constellations crossed by the ecliptic. Ophiuchus is one of thirteen constellations that cross the ecliptic. The dust band that causes the zodiacal light is uniform across the whole ecliptic. They mark the locations of longitudes on the ecliptic for specific stars. These represent perturbations in the Moon's ecliptic latitude. Eratosthenes most probably used a solstitial armilla for measuring the obliquity of the ecliptic. This will be associated with wild swings in the obliquity of the ecliptic as well. Pallas has a relatively high orbital inclination to the plane of the ecliptic. This included rings for the meridian and ecliptic. The motto appears on a band roughly coincident with the ecliptic. The intersections of the ecliptic with those great circles provide the house cusps. Nutation is the oscillation of the ecliptic plane.