↩ 🔵 🔵 🔵 ❪✺❫ Spectroscopic Concepts ○ ❪✺_❫ Electromagnetic Subs ○ ❪✺_❫ Spectral Fitting Subs ○ ❪✺_ₛₛ❫ Spectroscopic Subsets ○ Hard X-Ray ○꠹ Soft X-Ray ○꠹ Spectral Color ○