High Energy Astronomy Observatory
# 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".

