↩ 🔵 🔵 🔵 ❪✺ᵢ❫ Accretion Concepts ○ ❪✺₁₍₀₎❫ Astronomical Class Corridors ○ ❪✺₁₍₀₎❫ High-Energy Astrophysics Class Corridors ○ Accretion Disk ○꠹