Explanation: 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, NGC 7023 is not the only nebula in the sky to evoke the imagery of flowers, though. Still, this deep telescopic view shows off the Iris Nebula's range of colors and symmetries in impressive detail. 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 dusty clouds 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. The pretty blue petals of the Iris Nebula span about six light-years.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: NGC 7023 - Tumannost' Iris - otrazhatel'nye tumannosti Publikacii so slovami: NGC 7023 - Tumannost' Iris - otrazhatel'nye tumannosti
Sm. takzhe: Prizraki v Kassiopee NGC 6727: tumannost' Buinyi Pavian NGC 7023: tumannost' Iris M78 ot kosmicheskogo teleskopa "Evklid" Svet, temnota i pyl' Otrazheniya tumannosti Prizrak Prizraki γ Kassiopei Vse publikacii na tu zhe temu >>