Complex sentence: The reflection nebula portion of the nebulous region of Sh2-279 is sometimes popularly named the Running Man Nebula, was first catalogued as part of the major clustering of reflection nebula as CMa R1 by van den Bergh in 1966.
Split into simpler sentences: The reflection nebula portion of the nebulous region of Sh2-279 is sometimes popularly named the Running Man Nebula. It was first catalogued as part of the major clustering of reflection nebula as CMa R1 by van den Bergh in 1966.