The point directly beneath an observer (opposite to the zenith) which is always perpendicular to the celestial horizon.

See ‘diurnal/nocturnal’.

The hemisphere beneath the horizon, comprising the 1st, 2nd, 3rd, 4th, 5th and 6th houses.

See ‘sect’.

The north and south nodes indicate the points in the zodiac where the plane of the Moon’s orbit intersects the plane of the ecliptic. These are sensitive areas where eclipses occur.