High Energy Astrophysical Observatory
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. Abbreviation: HEAO
Words To Know For High SchoolWhether you are an incoming freshman, a parent of a student, or teacher or tutor trying to teach some life skills, here is a handy guide to some essential words for a successful high school career.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019