on an evening in 1981 i was driving north from the small town of exmouth to the us naval (navcomsta h.e.holt) communication base to deliver a pizza to an employee of mine who was in the base hospital. we have very clear skies in exmouth and i noticed what i took to be a very bright planet at about 11 o'clock high on the way out. after making my delivery as i drove back into town i looked for the planet again but it wasn't there. i looked all around the sky and located it again at a very low elevation due east of me. i pulled over and stood on the roof of my car so i could see over the surrounding scrub. what i observed was a white oval cross sectioned object with an orange coloured dome on top. it continued to descend from about 20 deg. above the horizon down to the ground coming between myseld and the range of hills about 6 kilometers from me. the area in which it came down is inaccessible undfer normal circumstances. it was not an airplane or helicopter and unfortunately no one else witnessed the event.