SUNSET: 
0
Photographer:
Jon Greif
Location of Photo:
Encina y Estrellas , Spain, remotely from La Jolla, CA, USA
Date/Time of photo:
October 8, 2022 between 10 pm and midnight local time.
Equipment:
Samyang 135 mm @F2.8, ZWO ASI1600MM Camera Ha, OIII, SII Filters , Lodestar SX2 guider with ZWO 30 f/4 guidescope. Paramount MyT Mount.
Description:
Waiting for a clear night in La Jolla (it's been months!), I processed some data obtained remotely (via iTelescope.net) in October of last year from a telescope in Spain. This is the Veil Nebula, a cloud of heated and ionized hydrogen, sulfur and oxygen gas and dust in the constellation Cygnus, approximately 2400 light-years from Earth. It constitutes the visible portions of a supernova remnant, the source of which was a star 20 times more massive than the Sun which exploded between 10,000 and 20,000 years ago. At the time of the explosion, the supernova would have appeared brighter than Venus in the sky, and visible in the daytime. 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).
