↩ 🔵 🔵 🔵 ❪✺_ₜₛ❫ Astronomical Typesets ○ ❪𖣐₂❫ Astronomy Instrumentation ○ ❪𖣐₂’❫ Gamma-Ray Observatories ○ ❪𖣐₂’❫ X-Ray Observatories ○ AstroSat ○̉ Gaia ○̉ Vera C. Rubin Observatory ○̉