↩ 🔵 🔵 🔵 ❪✺₃❫ Astronomical Particulars ○ ❪✺₃ₐ❫ Physics Hubs ○ ❪✺₃ₐ❫ High-Energy Astrophysics Hubs ○ Astrophysics Data System (ADS) ○➛ General Coordinates Network (GCN) ○➛ SIMBAD ○➛ The Astronomer’s Telegram (ATel) ○➛