sentences:  The two orbital nodes are the two end points of the "line of nodes" where a tilted orbit intersects the plane of reference; here they may be 'seen' where the blue section of an orbit becomes violet/pink.The two images below show the positions of perihelion (q) and the aphelion (Q) in the orbits of the planets of the Solar System.The chart shows the extreme range—from the closest approach (perihelion) to farthest point (aphelion)—of several orbiting celestial bodies of the Solar System