Back مرصد أينشتاين Arabic Observatori Einstein Catalan Einsteinova rentgenová observatoř Czech High Energy Astronomy Observatory 2 German HEAO-2 Spanish رصدخانه اینشتین Persian Einstein-observatorio Finnish HEAO-2 French High Energy Astronomy Observatory 2 Galician טלסקופ החלל איינשטיין HE
Einstein Observatory (HEAO-2) was the first fully imaging X-ray telescope put into space and the second of NASA's three High Energy Astrophysical Observatories. Named HEAO B before launch, the observatory's name was changed to honor Albert Einstein upon its successfully attaining orbit.