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Celestial hemisphere:  Southern  ·  Constellation: Puppis (Pup)
Ablated Structure in the Head of CG4, @HalH75
Ablated Structure in the Head of CG4
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Ablated Structure in the Head of CG4

Ablated Structure in the Head of CG4, @HalH75
Ablated Structure in the Head of CG4
Powered byPixInsight

Ablated Structure in the Head of CG4

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Description

Several cometary globules can be found in the southern hemisphere’s Gum Nebula region, which generally have dense, dusty heads and long tails that point away from the prominent OB2 stellar association in Vela.  Likely originating from ablation of opaque clouds by the winds and radiation fields from that association’s massive stars, the intricate structure of CG4, shown here, render it as one of the most striking examples. The serendipitous appearance of the nearly edge-on background galaxy PGC 21338, which appears as if about to be devoured by a cosmic predator, and a tight circlet of stars just to the galaxy's left, are intriguing. This reoriented and slightly reprocessed image was acquired originally in the spring of 2019 by a field-corrected ASA 0.5-m Newtonian reflector (f/3.8) using 10-min unbinned exposures taken through H-alpha, red, green and blue filters, which were stacked for 40, 50, 50 and 50 min, respectively.

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Ablated Structure in the Head of CG4, @HalH75

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Processed with Photoshop
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