title: High Energy Astronomy Observatory
text: # High Energy Astronomy Observatory
  
  High Energy Astrophysics Observatory can refer to:
  
  * 1st High Energy Astronomy Observatory (HEAO 1)
  * Einstein Observatory (HEAO 2)
  * 3rd High Energy Astronomy Observatory (HEAO 3)
  * HEAO Program
  
  Note that the correct (original) names for these three satellites are "High Energy Astronomy Observatories", not "Astrophysics".
  
  