↩ 🔵 🔵 🔵 ❪✺₄❫ High-Energy Astrophysics Sets ○ ❪✺_ₛₛ❫ Astronomical Subsets ○ ❪◑❫ Astronomical Objects ○ X-Ray Binary (XRB) ○꠹ ❪◑❫ High-Mass X-Ray Binaries (HMXB) ○ ❪◑❫ Low-Mass X-Ray Binaries (LMXB) ○ Hercules X-1 ❍