The Ring Nebula (Doug Azwell)

Celestial hemisphere: Northern · Constellation: Lyra (Lyr) · Contains: IC 1296 · M 57 · NGC 6720 · PK063+13.1 · Ring Nebula

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The Ring Nebula

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The Ring Nebula

The Ring Nebula, known as NGC 6720 in the New General Catalogue and M57 in the Messier list, is a bright planetary nebula in Lyra in the northern hemispheric sky. It is thought to have been discovered by Charles Messier, the French astronomer who was looking for comets, in the waning days of January of 1779. Astronomers believe that the central core star within the ring reached the end of its ability of fuse hydrogen and possibly helium causing the outer envelope of gas to rapidly collapse. The collapse creates a pressure surge which in turn causes a tremendous temperature increase in the core. This spike in temperature triggers a nuclear chain reaction creating a nova. The explosive release in energy pushes the gas back outward at high velocity. As the gas continues to expand outward it interacts with the original star's magnetic fields and creates a unique shape to the nebula. The gas is illuminated by the exceedingly hot core remnant which gives off a lot of ultraviolet light causing the gases to fluoresce. The colors of the gases and their mixtures in the ring is determined by their chemical makeup. In the case of the ring nebula, it is thought that we are looking down the core of a tube at the original star nucleus.

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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	Advanced success
Started	...
Astrometry.net job	4373215
PixInsight job	BNFIEDMH2ILOMB8F3PCNP8RFC2R7CL3K
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h53m52s.166
RA (top/left)	18h52m38s.627
RA (top/right)	18h55m04s.500
RA (bottom/right)	18h55m06s.230
RA (bottom/left)	18h52m39s.922

Dec (center)	+33°02′38″.61
Dec (top/left)	+32°51′19″.10
Dec (top/right)	+32°50′50″.54
Dec (bottom/right)	+33°13′55″.31
Dec (bottom/left)	+33°14′24″.90

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The Ring Nebula

The Ring Nebula

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Image Index:

Contribution Index (beta):

The Ring Nebula

The Ring Nebula

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