NYPD Blue | Toronto Blue Jays | Blue Peter | Blue | Blue Ridge Mountains | Blue Öyster Cult | Blue Note Records | Blue Heelers | Pokémon Red and Blue | Winnipeg Blue Bombers | Blue Nile | Blue's Clues | ''Pokémon Red'' and ''Blue'' | Blue Man Group | Vida Blue | The Blue Danube | Rhapsody in Blue | blue plaque | Blue Mountain State | Blue Cheer | Blue Bloods | Blue Beetle | Ateneo Blue Eagles | Project Blue Book | Blue Hill, Maine | Operation Blue Star | Kind of Blue | Blue Bloods (TV series) | Blue Angels | Three Colors: Blue |
The cluster contains a large number of rare, evolved, high-mass stars, including: 6 yellow hypergiants, 4 red supergiants, 24 Wolf-Rayet stars, a luminous blue variable, many OB supergiants, and an unusual supergiant sgBe star which has been proposed to be the remnant of a recent stellar merger.