I photographed this over 2 nights with Bortle 5 skies and a quarter moon. Acquisition was 78-5 minute exposures using an unmodified Nikon Z7 @ ISO 1600. The
East Veil Nebula is part of the larger Vail Nebula, a cloud of heated and
ionized gas and dust in the constellation
Cygnus.
[4] It constitutes the visible portions of the
Cygnus Loop,
[5] a
supernova remnant, many portions of which have acquired their own individual names and catalogue identifiers. The source
supernova was a star 20 times more massive than the
Sun which exploded between 10,000 and 20,000 years ago.
[2] At the time of explosion, the supernova would have appeared brighter than
Venus in the sky, and visible in daytime.
[6] The remnants have since expanded to cover an area of the sky roughly 3 degrees in diameter (about 6 times the diameter, and 36 times the area, of the full Moon).
[4] While previous distance estimates have ranged from 1200 to 5800
light-years, a recent determination of 2400 light-years is based on direct astrometric measurements. (Wiki).
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