The North Node in a birth chart
The Moon does not circle the Earth in the same plane in which the Sun appears to move: its orbit is tilted by about five degrees.
It therefore crosses the ecliptic at two points. The North Node is where the Moon passes northward, the South Node where it comes back down. When a new or full moon occurs near these points, there is an eclipse: hence their importance in every tradition of the sky.
The axis of the nodes slowly moves backward through the zodiac, in about eighteen and a half years. Births within the same period of about a year and a half therefore share the same nodal sign; the house, however, depends on the time. Modern astrology, especially since the 1970s, reads the North Node as a direction in life: qualities that do not come naturally, which the person would gain from developing to balance what the South Node gives them right away. In Libra, this would be learning to listen; in Capricorn, responsibility; in the 10th house, public commitment.
This reading remains an interpretation. It only makes sense if it sheds light on choices, without becoming a program or an imposed “mission.” Versana uses the true node by default, which oscillates slightly around the mean position; the mean node remains available among the chart options.