Assertion: lagoon nebula | /r/HasProperty | messier
Facets:
Source sentences:
text: Lagoon Nebula, Messier 8, M8, Sharpless 25, RCW 146, Gum 72, NGC 6523
text: For observers in northern latitudes, the Omega Nebula is one of the three finest emission nebulae that can be seen in a small telescope, along with the Lagoon Nebula (Messier 8), also in Sagittarius, and the Orion Nebula (Messier 42) in Orion.