ascending node

…the reference plane, and the ascending node is that point where the planet travels from below the reference plane (south) to above the reference plane (north). The ascending node is described by its angular position measured from a reference point on the ecliptic plane, such as the vernal equinox; the…

…is the longitude of the ascending node, i.e., of the point where the moving planet passes north of the plane of Earth’s orbit. M, the descending node, is where the planet passes from north to south. The sum of the angles subtended at S by the arcs VN and NA…

The ascending node is the point where the Moon crosses the ecliptic from south to north, and the descending node is where it crosses from north to south. The nodes move along the ecliptic from east to west as seen from Earth, completing a revolution in…