↩ 🔵 🔵 🔵 ❪✺❫ Astronomical Concepts ○ ❪✺_❫ Physical Subs ○ ❪✺_ᵢ❫ Accretion Subs ○ ❪✺_❫ High-Energy Astrophysics Subs ○ ❪✺_ₛₛ❫ Astronomical Subsets ○ ❪∂_❫ Astronomical Subs ○ Accretion Disk Corona ○꠹