View allAll Photos Tagged CrescentNebula
The Crescent Nebula is an emission nebula that stretches about 25 lightyears across and is located about 5,000 lightyears away from Earth.
Created by its central Wolf-Rayet star, these stars are rare, massive stars in a late evolutionary phase, characterized by extreme stellar winds and rapid mass loss. With surface temperatures ranging from 30,000 to 200,000 Kelvin, they are among the hottest stars in the universe.
WR stars have shed their outer hydrogen layers, exposing their helium-burning cores, often showing strong emission lines of helium, carbon, and nitrogen.
These stars are highly luminous, up to millions of times brighter than the Sun. Their explosive mass loss plays a crucial role in enriching the interstellar medium and they are often precursors to supernovae or even black hole formation.
Image of the Crescent Nebula (NGC6888), about 5000 light years away. Taken with an Orion EON 130mm triplet with field flattener, using a QHY168C 14-bit color camera, and a 48mm diameter OptoLong Quad pass filter in front of the camera. This is a combination of different filter stacks, each of many 300 sec exposures from backyard Sunnyvale California location. Scope was mounted on a Losmandy G11 mount, and using a Celestron 80mm piggyback scope with ASI178MM video camera and PHD2 for autoguiding. Final image integration and denoising were done in Affinity Photo.
Image of the Crescent Nebula (NGC6888), about 5000 light years away. Taken with an Orion EON 130mm triplet with field flattener, using a QHY168C 14-bit color camera, and a 48mm diameter Baader Halpha filter in front of the camera. This is a combination of many 300 sec exposures from backyard Sunnyvale California location. Scope was mounted on a Losmandy G11 mount, and using a Celestron 80mm piggyback scope with ASI178MM video camera and PHD2 for autoguiding. Final image integration and denoising were done in Affinity Photo.
The Cygnus constellation is full of various hydrogen nebulae, but they are very faint in visible wavelengths, so it's very difficult to see them with your eyes in a telescope. However, when you use a modified camera, which lets the infrared wavelengths go through, and you take a long exposure, the complicated nebulae will appear.
One of the brightest nebulae in Cygnus (which is even visible in big telescopes) is called the Crescent Nebula and lies roughly in the center of my image. In the upper right corner, there you can also see Tulipan nebula (or Sh2-101), which is fainter than Crescent and lies at a distance of 6000 light years, which is about 1300 ly further than Crescent. Another interesting region lies in the bottom left corner. It's a Sadr region, which is named after a Sadr star, which is the brightest star in the picture and lies 1800 light years from Earth.
This image was taken on the 7th of July with my modified camera Canon EOS 1300D and CLS filter, which lets only H-alpha and OIII parts of the spectrum pass through and that's why, it can capture such beautiful details in the nebulae. The result amazed me. It is created only from 3 hours of data, which isn't pretty much for this region. Truly happy with this progress and looking forward to the next tries.
Canon EOS 1300D (modified), SVBony CLS filter
Sigma 135mm f/2.8
iOptron SkyGuider Pro
EXIF: 120x90sec (3 hours in total), ISO 3200, f/5.6
Darks, flats, dark flats, biases
Processed in DSS, Siril, StarNet++, and Photoshop
07/07/2023, Mašov, Czech Republic (Bortle 5)
NGC 6888, the Crescent Nebula, glowing in the heart of the constellation Cygnus, about 4,700 light-years away. This beautiful emission nebula is actually a cosmic bubble, created by the powerful stellar winds of a massive Wolf-Rayet star known as WR 136. This star, about 20 times the mass of the Sun, is shedding its outer layers at an incredible rate. As the fast wind from its current life stage slams into slower-moving material it ejected earlier, the gas heats up and lights up in a spectacular display of hydrogen (red) and oxygen (blue-green) emissions.
The Crescent Nebula spans about 25 light-years across, but it’s far too faint to see with the naked eye — even through a telescope it requires dark skies and patience. Thankfully, long-exposure astrophotography lets us capture the intricate filaments and delicate details hidden in this stellar bubble.
Cygnus is full of wonders. The Crescent is a reminder that even in its death throes a massive star can create something breathtakingly beautiful.
Acquisition details: 70mm Quad APO Astrograph, AVX mount, QHY183C CMOS camera, Optolong L-eXtreme dual band narrowband filter, (100x120s) 3 hours of data taken on July 31, 2025. Processed using DSS, SAS, Ps.
The #CrescentNebula is an emission nebula in the #Cygnus constellation. It formed 250,000 to 400,000 years ago when fast stellar winds from a hot WR star collided with slower moving winds expelled by the star when it exploded into a red giant. It lies 5000 light years away, which means that the light from the red hydrogen and blue oxygen of the object took 5000 years to reach the sensor of my camera. #StillLearning
37x300" @ Gain 100
1000mm @ f/5.2
Telescope: Skywatcher 190MN
Camera: ASI533MC Pro
Mount: HEQ5 Pro
Guide Scope: Williams Optics 50mm
Guide Camera: ASI120mm
Filter: Optolong L-Extreme
The #CrescentNebula is a faint emission nebula 5000 light years from Earth in the #Cygnus constellation. It formed about a quarter of a million years ago when its central star became a red giant and expelled most of its hydrogen. The star is expected to turn into a supernova in the not-so-distant future. This image is two hours and forty-five minutes of exposure captured a few nights ago under dewy conditions that caused me to throw away an additional nearly three hours of exposure. #StillLearning