Orion A and star formation.

Birthplace of the suns: The integral-shaped filament, the two star clusters above the filament, and cloud L1641 in the south can be seen on these images of the Orion A star formation region. The picture on the left shows a density map compiled with data from the Herschel space telescope, the one on the right an infrared image taken by the WISE space telescope. The photo in the center is a combination of both images.

 

Double filaments with star forming along their length, terminate at massive star forming clusters. That association relates to a focused area of star creation like the Orphan Cluster centre as an end point for these filaments, with the arrival of matter and expansion from a central object, that forges this cluster.

NGC 1977 as termination point for filaments