What is NGC 6559?
[[File:The_star_formation_region_NGC_6559.jpg|thumb|{{center|NGC 6559}}]] '''NGC 6559''' is an [[star formation|star forming region]] in the [[constellation]] of [[Sagittarius (constellation)|Sagittarius]]. It is about 5,000 [[light year]]s from [[earth]].<ref name=Ratcliffe35.6>Martin A. Ratcliffe, ''State of the Universe 2007: New Images, Discoveries, and Events'' (New York; Berlin: Springer Publishing; Praxis Publishing, 2007), pp. 35–36</ref> About 7 light years across, it is a dense [[wikt:cloud|cloud]] of [[dust]] that hides other [[star]]s.<ref name=Ratcliffe35.6/> == References == {{reflist}} [[Category:Nebulae]] {{sci-stub}}