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Harel Boren | all galleries >> International Acknowledgements - APODs and Publications > NGC7023 vdB139 C12 The Iris Nebula in Cepheus (1300 pixels)
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NGC7023 vdB139 C12 The Iris Nebula in Cepheus (1300 pixels)
August 2010 Harel Boren

NGC7023 vdB139 C12 The Iris Nebula in Cepheus (1300 pixels)

Km. 101, East Negev Desert, Israel

SBIG ST8300C, Total 3:10 hours = RGB 37x5 min
Boren-Simon 2.8-8 ED OTA - - EQ6 mount, guided w/PHD and EQMOD

From NASA APOD of June 10, 2009
These clouds of interstellar dust and gas have blossomed 1,300 light-years away in the fertile star fields of the constellation Cepheus. Sometimes called the Iris Nebula and dutifully cataloged as NGC 7023, this is not the only nebula in the sky to evoke the imagery of flowers. Surrounding it, obscuring clouds of dust and cold molecular gas are also present and can suggest other convoluted and fantastic shapes. Within the Iris, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the cosmic dust glow with a faint reddish photoluminesence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula may contain complex carbon molecules known as PAHs. At the estimated distance of the Iris Nebula this remarkable wide field view is over 30 light-years across.

There's also a view of the nebula's central area here:
A slightly brighter version of this image can be found here:

other sizes: small medium large original
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