The ClamShell Nebula Sh2-119 (AstroSeabee)

The ClamShell Nebula Sh2-119

Sh2-119 is a well-known emission nebula located in the constellation Cygnus. It is also commonly referred to as the "Clamshell Nebula" due to its distinctive shape, resembling the shells of a clam. Sh2-119 is situated within the larger complex of nebulosity known as the North America Nebula (NGC 7000). Its peculiar shape and structure make it a fascinating region of interest for astronomers and astrophotographers alike. The nebula is predominantly composed of ionized hydrogen gas (H II region) that emits light in the red wavelength of the electromagnetic spectrum. It is illuminated by a cluster of young, massive stars located in its vicinity, which provide the energy to ionize the surrounding gas and thus creating the characteristic typical of all emission nebulas. Sh2-119 has several intricate details and structures, including filaments, dark dust lanes, and brighter regions of gas and dust. These features are a result of various physical processes like stellar winds, radiation pressure, and shockwaves within the nebula, uniquely sculpting the gas and dust into beautiful and intricate patterns. As with any deep space object, imaging can provide valuable insights into the formation and evolution of massive stars, as well as the dynamics and composition of interstellar medium in the region. It serves as a reminder of the vast and diverse nature of our cosmos and the ongoing processes that shape it.

William Optics ZenithStar Z61/Z81

Please note: The following tables are updated every 24 hours.

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.

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