A group of astrophotographers discovered an enormous oxygen nebula hiding in plain sight next to the Andromeda Galaxy.
The huge blue oxygen arc discovered by astrophotographers next to the Andromeda Galaxy.
“They determined there was something interesting going on that needed a secondary follow-up to help rule out potential sources of error for the strange data,” Falls tells“Things like gradients, lens flares, or bad flat frames could create artifacts that confuse us astrophotographers into thinking we see something real.”The ghostly images showing up on astrophotographers’ cameras were not aberrations but an oxygen nebula very close to the extensively studied Andromeda Galaxy.
The O-III filter is often overlooked because it is subject to light pollution and can be incredibly faint in the night sky. “Our initial images of this oxygen arc were very, very noisy because this arc is incredibly faint,” says Falls. “With this combination at f/3.6 and a short focal length of about 400mm, I was able to get a wide field-of-view with very fast speeds allowing me to get a great amount of details on the nebula.”“It’s an active area of study and we don’t really know yet,” says Falls. “It’s been a topic that’s been being studied for the last four or five months… This is what happens when you’re dealing with new discoveries.
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