↩ 🔵 🔵 🔵 ❪✺ᵢ❫ X-Ray Binary Concepts ○ ❪✺₁₍₀₎❫ Astronomical Class Corridors ○ ❪✺₁₍₀₎❫ High-Energy Astrophysics Class Corridors ○ ❪✺₁𝑖❫ Classes of X-Ray Binaries ○