Este fue
tu cielo.

A High Energy Fleet

NASA's High Energy Astrophysical Observatory spacecraft, HEAO-1, HEAO-2, and HEAO-3, appear in this illustration. HEAO-1 and HEAO-2 were crucial for mapping the X-ray sky, discovering thousands of high-energy radiation sources. HEAO-2, also known as the Einstein Observatory, was the first fully imaging X-ray telescope. These observatories significantly advanced our understanding of the universe's most energetic phenomena.