The line of intersection of the Moon's orbit with the ecliptic plane.
In an orbit, the line between the ascending and descending nodes.
The imaginary line passing through the ascending and descending nodes of an orbit. It is the line of intersection of the orbital plane with the reference plane.
The nodes of the moons orbit are the points where it passes through the plane of the earth's orbit. An eclipse season occurs whenever the line connecting these nodes (line of nodes) points toward the sun.
the intersection of a planet's or the Moon's orbit with the Earth's orbit.
The line of nodes connects the two points where a typical satellite's orbit crosses the earth's equatorial plane. At the ascending node, the satellite traverses the equatorial plane from south to north. At the descending node, it crosses the plane from north to south. The line of nodes is shown in this figure of the classical orbital elements.