In this image there are two nebulae and a bright blue star: The North America Nebula (top left), the Pelican Nebula (bottom, in the middle) and Deneb (bright blue star in the bottom right).
The North America nebula was first observed by William Herschel on October 24, 1786. It would not be until 1890, when Max Wolf took a photograph of the nebula, noting it's shape and naming it accordingly. Astronomers today estimate it to be 2,590 light years away and 90 light years across in diameter.
The Pelican Nebula is an interstellar neighbor of the North America Nebula. Astronomers estimate it to be 1,800 light years away and "only" 50 light years across.
Finally, the bright blue star in the bottom right is called Deneb. This star is the brightest star in the constellation of Cygnus and the 19th brightest star in the sky. God created this star to offer us a lesson of perspective. While many of the brightest stars in the night sky are 'only' 10-300 light years away, Deneb is located a whopping 2,615 light years away. This means that while Deneb doesn't look very bright, it's estimated to be around 196,000 times brighter and 200 times larger than the Sun. If Deneb sat where the Sun did, the Earth would be engulfed by Deneb.
"Yahweh, there is no one like You.
You are great;
Your name is great in power.
Who should not fear You,
King of the nations?
It is what You deserve.
For among all the wise people of the nations
and among all their kingdoms,
there is no one like You." (Jeremiah 10:6-7)
--------------------------------------------------------------
Below are the details for how I acquired this image:
Details:- Date: November 26, 2021
- Location: Bortle 4
- Temperature: 5 C (42 F)
- Total Integration Time: 53 minutes, 8 seconds
Equipent:- Nikon D750
- Tamron SP 150-600mm f/5-6.3 Di VC USD A011N
- iOptron Sky Guider Pro
- Feisol CT-3442 Tripod
- USB Dew Heater
Acquisition:- Focused on stars with live view
- 222 x 75” @ 400mm, ISO 8000, f/6.3
- Photographed from 6:54 to 11:05 PM local time
Pre-Processing:- Imported images in Adobe Bridge, edited in Camera RAW
- Adjusted hue, saturation, and balanced color with changes to temperature and tint
- Increase exposure, turned down contrast and highlights
- Applied Lens Correction, removed distortion
- Exported as TIFFs
- Followed this guide (Peter Zalinka)
Stacking:- Deep Sky Stacker
- Imported 220 lights
- Registered all picutures. Sorted and removed manually
- Stacked lights with Sigma Clipping method
- Exported stacked image as TIFF
Mid-Processing:- Opened TIFF in Siril
- Cropped image in Siri
- Adjusted the Color Calibration after defining the background
- Auto-stretched the image, adjusted the stretch manually
- Removed the Green Noise
- Performed a Background Extraction
- Performed an Asian Transformation
- Adjusted Color Saturation
- Saved as TIFF
- Followed this guide (Kamil Pekala)
Post-Processing:- Edited in Adobe Photoshop CC
- Stretched image
- Applied a few S-curves
- Added a Camera RAW filter, focused on neutralizing background
- Stretched image again
- Added a couple more S-curves
- Added final Camera RAW filter, focused on adding some saturation and cleaning up noise
Clear skies and God bless!
Comments