The Crescent Nebula (NGC 6888) (Sean Liang)

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

The Crescent Nebula (NGC 6888), Sean Liang

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The Crescent Nebula (NGC 6888)

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The Crescent Nebula (NGC 6888)

This image is a snapshot of a dying star!About 120,000 to 240,000 years ago, a bright, massive star approached the end of its life. The old star became unstable, and the pulsation on the outer layer caused it to eject materials into outer space. As the outer layer drifts away, the stellar wind from its core caught up with the material, blowing away the cloud and ionising it to form this spectacular cosmic bubble scene!Eventually, the old star will collapse under its own mass and die in a spectacular fashion. It will contract and explode, forming an extremely bright, super-powerful supernova that shines upon our night sky.The image uses colours to differentiate the elements within the nebula. The blue bubble is made of oxygen while the red interior is predominantly hydrogen.(The data was collected from the ‘IC Astronomy Observatory’ in Spain over a 5-month period through Telescopelive. I processed it using Pixinsight, Photoshop and Topaz DeNoise)

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	5384662
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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The Crescent Nebula (NGC 6888)

The Crescent Nebula (NGC 6888)

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The Crescent Nebula (NGC 6888)

The Crescent Nebula (NGC 6888)

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