Explanation: These cosmic clouds have blossomed 1,300 light-years away in the fertile starfields of the constellation Cepheus. Called the Iris Nebula, NGC 7023 is not the only nebula to evoke the imagery of flowers. Still, this deep telescopic image shows off the Iris Nebula's range of colors and symmetries embedded in surrounding fields of interstellar dust. Within the Iris itself, 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 reflection nebula glow with a faint reddish photoluminescence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula contains complex carbon molecules known as PAHs. The dusty blue petals of the Iris Nebula span about six light-years.

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

Publikacii s klyuchevymi slovami: dust - reflection nebula - NGC 7023 - otrazhatel'nye tumannosti Publikacii so slovami: dust - reflection nebula - NGC 7023 - otrazhatel'nye tumannosti
Sm. takzhe: M78 ot kosmicheskogo teleskopa "Evklid" Pleyady: Sem' Sester v pyli Svet, temnota i pyl' Otrazheniya tumannosti Prizrak Prizraki γ Kassiopei IC 4592: otrazhatel'naya tumannost' Golubaya konskaya golova NGC 7023: tumannost' Iris Vse publikacii na tu zhe temu >>