From northeast to southwest these include M16 (the Star Queen or Eagle Nebula) in Serpens; the emission nebulae M17 (Swan), M20 (Trifid), and M8 (Lagoon) in Sagittarius; the open clusters M21 in Sagittarius and NGC 6231 in Scorpius; the open cluster and emission nebula NGC 6193 and 6188 in Ara; the open cluster NGC 4755
(Jewel Box) in Crux; and the giant emission nebula NGC 3372, also known as the Eta Carinae Nebula.
6, ASSA 49 NGC 4463, Collinder 260, open cluster vdBH 135 Coal Sack, C 99, ASSA 51 dark nebula M 88, NGC 4501, LEDA 41517 galaxy Stargate Asterism asterism NGC 4565, LEDA 42038, C 38 galaxy NGC 4609, Coalsack Cluster, open cluster C 98 NGC 4755
, Jewel Box, C 94, open cluster ASSA 52 M 64, NGC 4826, Black Eye galaxy Galaxy NGC 4833, C 105, Ben 56, globular cluster ASSA 53 M 53, NGC 5024, Melotte 117 globular cluster NGC 5189, IC 4274, Ben 62, planetary nebula ASSA 57 Designation Co-ordinates (J2000.
But what makes the view striking is that the nebular void is bracketed by the brilliant sapphires of Alpha ([alpha]) and Beta ([beta]) Crucis and crowned by the compact, wonderful Jewel Box Cluster, NGC 4755