It became possible in the 1990s to discover very young open clusters that previously had been entirely hidden in deep, dusty regions. (britannica.com)
NGC 6530 is an extremely young open cluster which was formed from the material of the Lagoon Nebula M8, and it is situated well within this diffuse nebula. (maa.clell.de)
The Ara Cluster is a compact young open cluster located approximately 12,100 light years from Earth. (constellation-guide.com)