Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174 (GeOK)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Iris Nebula · NGC 7023

Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174, GeOK

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Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174

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Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174

This wide field image includes the bluish Iris Nebula (NGC 7023) at the center, and several dark (or absorption) nebulae - from left to right; LDN 1173 (small portion upper left side), LDN 1170 (center near left edge), LDN 1172 (between LDN 1170 and NGC 7023), and LDN 1174 (above NGC 7023). Absorption nebulae are comprised of molecular hydrogen, many other molecules including hydrocarbons, and dust concentrations, which block the visible light from stars that are behind the nebulae. The temperature inside absorption nebulae can be extremely cold; 7 – 15K, which allows hydrogen and upwards of 70 other molecules to form. Another example of an absorption nebula is the iconic Horsehead Nebula in the constellation of Orion. Absorption nebula are where stars and solar systems form.

http://abyss.uoregon.edu/~js/glossary/dark_nebula.html
Lynds, B.T. 1962, `Catalogue of Dark Nebulae', ApJS, 7, 1. [LDN]. Marcout, J., and Ochsenbein, F. 1996, CDS revised version of LDN

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	Image of the day	Top pick	Top pick nominations	Total submitted
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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.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
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Status	Basic success
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Astrometry.net job	5715322
PixInsight job	n/a
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Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174

Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174

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Image Index:

Contribution Index (beta):

Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174

Iris Nebula, NGC 7023, LDN 1170, LDN 1172, LDN 1173, LDN 1174

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