Crescent Nebula [NGC6888] in RGB+HaOiii (Jakob Sahner)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · NGC 6888

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Crescent Nebula [NGC6888] in RGB+HaOiii

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Crescent Nebula [NGC6888] in RGB+HaOiii

The Crescent Nebula, also known as NGC 6888, is a stunning emission nebula located in the constellation Cygnus. It is renowned for its unique shape resembling a celestial crescent, hence its popular name. The nebula spans about 25 light-years across and lies approximately 4,700 light-years away from Earth.What makes the Crescent Nebula particularly captivating is its vibrant and intricate OIII (oxygen-three) shell. This shell is formed by the interaction of fast-moving stellar winds from a central Wolf-Rayet star, designated WR 136, and the surrounding interstellar medium. The intense radiation emitted by the star ionizes the surrounding gas, causing it to glow in the characteristic blue-green hues associated with OIII emissions.The OIII shell appears as a delicate and ethereal structure enveloping the central Wolf-Rayet star. Its intricate filaments and loops create a captivating tapestry of cosmic artistry. The interplay between the stellar winds and the surrounding nebular material shapes the Crescent Nebula into its distinctive crescent-like appearance.NGC 6888 serves as a prime example of the stunning beauty and complex dynamics present in the universe. It stands as a testament to the intricate interplay between massive stars and their cosmic environments, offering astronomers and stargazers alike a captivating celestial spectacle to behold.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	7829017
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Crescent Nebula [NGC6888] in RGB+HaOiii

Crescent Nebula [NGC6888] in RGB+HaOiii

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Image Index:

Contribution Index (beta):

Crescent Nebula [NGC6888] in RGB+HaOiii

Crescent Nebula [NGC6888] in RGB+HaOiii

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