↩ 🔵 🔵 🔵 ❪✺❫ Physical Concepts ○ Relativity 𓆩⚪𓆪 ❪✺ᵢ❫ Black Hole Concepts ○ ❪✺₂❫ Relativistic Domains ○ ❪✺₄❫ Relativistic Sets ○ ❪∂❫ Relativity Math ○ ❪✺-❫ Floating Concepts — Relativity ○ Innermost Stable Circular Orbit (ISCO) ○ Spacetime ○ Synchrotron Radiation ○