NGC 6888 The Crescent Nebula in H-Alpha
This is NGC 6888, the Crescent Nebula. Just gonna flat-out steal from Wikipedia here:
"It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago."
Most of the visible emission is from hydrogen, I capture a bit of oxygen but the sulfur signal was so weak I didn't use it. About nine hours total of narrowband integration time, plus another hour and a half of normal-color frames to yield natural-color stars.”
This image is just shy of 10 hours of overall exposure time. Most of that was in the 656-nm hydrogen band, but I also did some broadband RGB for star color.
This is NGC 6888, the Crescent Nebula. Just gonna flat-out steal from Wikipedia here:
"It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago."
Most of the visible emission is from hydrogen, I capture a bit of oxygen but the sulfur signal was so weak I didn't use it. About nine hours total of narrowband integration time, plus another hour and a half of normal-color frames to yield natural-color stars.”
This image is just shy of 10 hours of overall exposure time. Most of that was in the 656-nm hydrogen band, but I also did some broadband RGB for star color.
This is NGC 6888, the Crescent Nebula. Just gonna flat-out steal from Wikipedia here:
"It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago."
Most of the visible emission is from hydrogen, I capture a bit of oxygen but the sulfur signal was so weak I didn't use it. About nine hours total of narrowband integration time, plus another hour and a half of normal-color frames to yield natural-color stars.”
This image is just shy of 10 hours of overall exposure time. Most of that was in the 656-nm hydrogen band, but I also did some broadband RGB for star color.