ASTRO:
     type=Supernova remnant
     const=Cygnus
     mag=7.0
     dist=2400 ly
     size=130 ly (all Cygnus Loop)
IMAGE:
     location=EB Driveway, BrtlCls=4
     moon=63% WnGb
     exposure=DSLR OSC: 48x420s (5.6h), ISO1600
EQUIPMENT:
​     optics=ES102CF APO / Stellarvue 1.0x fld-fltnr, FL=714mm, f/7.0
     camera=Nikon D90 (stk)
     filter=Radian Ultra Quad NB
     mount=Celestron AVX
     guiding=Orion 60x240mm, ZWO ASi244MC
SOFTWARE:
     acquisition=APT, PHD2, Stellarium
     processing=PixInsight (RCAstro, SetiAstro), Photoshop (Lumenzia, APF-R), LrC

The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus.  It constitutes the visible portions of the Cygnus Loop, a supernova remnant (or SNR), many portions of which have acquired their own individual names and catalogue identifiers. The source supernova was a star 20 times more massive than our Sun that is believed to have exploded 15,000 years ago.  At the time of explosion, the supernova would have appeared brighter than Venus in the sky and been visible in daytime.  The remnants have since expanded to cover an area of the sky roughly 3° in diameter (about 6 times the diameter of the full Moon).  The nebula lies appx 2400 light-years away from the Earth.

The Hubble Space Telescope has captured several images of the nebula. The analysis of the emissions from the nebula indicates the presence of oxygen, sulfur, and hydrogen.  The Cygnus Loop is also a strong emitter of radio waves and x-rays.

In modern usage, the names Veil Nebula, and Cygnus Loop generally refer to all the visible structure of the SNR in the entire loop itself. The structure is so large that several NGC numbers have been assigned to various parts of the nebula.  In this image, only the eastern portion of the 'Loop' is visible.  In another image of this collection, "240715 - C34 Western "Veil" nebula" shows a western portion, and in still another, "230522 - Cygnus Loop Cloud Complex", the entire SNR complex is encompassed.

211105 - C33 Eastern "Veil" nebula