↩ 🔵 🔵 🔵 ❪✺_ₜₛ❫ High-Energy Astrophysics Typesets ○ ❪𖣐₂’❫ Observatories ○ ❪𖣐₂❫ High-Energy Astrophysics Instrumentation ○ Compton Gamma Ray Observatory ○˒ FERMI ○̉