NGC 7023: The Iris Nebula in a Field of Interstellar Dust (Prabhakaran)

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

NGC 7023: The Iris Nebula in a Field of Interstellar Dust, Prabhakaran

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NGC 7023: The Iris Nebula in a Field of Interstellar Dust

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NGC 7023: The Iris Nebula in a Field of Interstellar Dust

What blue flower grows in this field of dark interstellar dust? The Iris Nebula. The striking blue color of the Iris Nebula is created by light from the bright star SAO 19158 reflecting off of a dense patch of normally dark dust. Not only is the star itself mostly blue, but blue light from the star is preferentially reflected by the dust -- the same effect that makes Earth's sky blue. The brown tint of the pervasive dust comes partly from photoluminescence -- dust converting ultraviolet radiation to red light. Cataloged as NGC 7023, the Iris Nebula is studied frequently because of the unusual prevalence there of Polycyclic Aromatic Hydrocarbons (PAHs), complex molecules that are also released on Earth during the incomplete combustion of wood fires. The bright blue portion of the Iris Nebula spans about six light years. The Iris Nebula, pictured here, lies about 1300 light-years distant and can be found with a small telescope toward the constellation of Cepheus.

Dark Nebula

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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.

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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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Astrometry.net job	6641980
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NGC 7023: The Iris Nebula in a Field of Interstellar Dust

NGC 7023: The Iris Nebula in a Field of Interstellar Dust

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NGC 7023: The Iris Nebula in a Field of Interstellar Dust

NGC 7023: The Iris Nebula in a Field of Interstellar Dust

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