Meaning of High Energy Astrophysical Observatory

High' En'ergy Astrophys'ical Observ'atory

Pronunciation: [key]
  1. one of a series of three U.S. satellites launched (1977–79) into orbit around the earth and equipped with instruments for studying high-energy phenomena, as x-rays, gamma rays, and cosmic rays. Abbr.: HEAO
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.