Este fue
tu cielo.

A High Energy Fleet

NASA's High Energy Astrophysical Observatory (HEAO) spacecraft, labeled A, B, and C in this illustration, were a series of space-based telescopes. HEAO-1 and HEAO-2 were crucial in mapping the X-ray sky, discovering thousands of high-energy radiation sources. HEAO-2, also known as the Einstein Observatory, significantly advanced our understanding of the X-ray universe.