Full moon in the sky.) Thus, there is no long period of darkness between sunset and moonrise for several days after the full moon, thus lengthening the time in the evening when there is enough light for men to see to work to get the harvest in. The "Maine Farmers' Almanac" from c. the 1930s began to publish Native American "Indian" full moon names. The "Farmers' Almanac" (since 1955 published in Maine, but not the same publication as the "Maine Farmers' Almanac") continues to do so. An early list of "Indian month names" was published in 1918 by Daniel Carter Beard in
Equinox zero. Its latitude will not be exactly zero, since Earth is not exactly in the plane of the ecliptic. Its declination will not be exactly zero either. (The ecliptic is defined by the barycenter of Earth and the Moon combined.) The modern definition of equinox is the instants when the Sun's apparent geocentric longitude is 0° (northward equinox) or 180° (southward equinox). See the adjacent diagram. Because of the precession of the Earth's axis, the position of the vernal point on the celestial sphere changes over time, and the equatorial and the ecliptic coordinate systems change accordingly. Thus when specifying