The regions studied in the MYStIX (Massive Young Star-forming Complex study in Infrared and X-ray) project are abbreviated as:

Car Carina Nebula DR21 DR 21 (W 1E) Eagle Eagle Nebula Flame Flame Nebula Lagon Lagoon Nebula M17 M 17 (W 38) N1893 NGC 1893 N2264 NGC 2264 N2362 NGC 2362 N3576 NGC 3576 (RCW 57A)

N6334 NGC 6334 (RCW 127) N6357 NGC 6357 (RCW 131) Orion Orion Nebula RCW36 RCW 36 (G265.1+1.5) RCW38 RCW 38 (G268.0-1.1) Roset Rosette Nebula Trifi Trifid Nebula W3 W 3 W4 W 4 (Heart Nebula) W40 W 40 (RCW 174)