planetarium theater—a building housing an instrument for projecting the positions of the stars and planets onto a domed ceiling:
- See stars and constellations on the dome of our planetarium theater; use a star chart to find stars in the sky.
planetary house —(Astrolog y) one of 12 equal areas (constellations) into which the zodiac is divided:
- One of the first published tests of natal astrology tested the thesis that planetary house locations were related to a person’s career path.