This frames most of the intricate arcs and loops of the Vela Supernova Remnant (SNR), the remains of a star that exploded about 11,000 years ago. It i
This frames most of the intricate arcs and loops of the Vela Supernova Remnant (SNR), the remains of a star that exploded about 11,000 years ago. It is one of the closest SNRs to Earth, about 900 light years away. Most arcs and segments have no separate catalogue numbers, with the exception of the short straight Pencil Nebula, aka Herschel's Ray, in the lower left corner which is NGC 2736. It is the brightest segment of the Vela SNR visually in a telescope. The nebula complex is marked with lots of cyan arcs emitting oxygen III wavelengths, mixed with regions of red hydrogen-alpha emission. The large area of red H-alpha nebulosity at top left is Gum 17. The small compact nebula below it is RCW 36. The field is about º by 5°. North is up in this framing. This is a stack of 8 x 10-minute exposures shot through an IDAS NBZ dual narrowband filter to bring out the nebulosity, blended with a stack of 12 x 5-minute exposures with no filter for the "natural light" background and starfield. Shot at ISO 3200 for the filtered shots and ISO 800 for the unfiltered shots, all with the filter-modified (by ) Canon EOS R camera, on the Sharpstar 61 EDPH III refractor at On the Astro-Physics AP 400 mount autoguided with the Lacerta MGEN3 stand-alone autoguider. The waning crescent Moon rising at 2 am prevented more exposures. Shot on a perfect night March 5, 2024 from Mirrabook Cottage near Coonabarabran, NSW, Australia.
Size: 6710px × 4430px
Photo credit: © Alan Dyer / VWPics / Alamy / Afripics
License: Licensed
Model Released: No
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