noun
ascending node
Astronomical term for the point where an orbit crosses a reference plane from south to north.
月の昇交点は約18.6年周期で移動する。
The Moon's ascending node moves with a period of about 18.6 years.
The descending node, where the orbit crosses the reference plane from north to south.
Compound of 昇 (ascending) + 交 (intersection) + 点 (point), a direct translation of the English term 'ascending node'.