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Alnitak Region B33 (Horsehead Nebula), NGC 2024 (Flame Nebula), NGC 2023, IC 431, IC 432, IC 434 and IC 435 in Orion LRGB combination (Click for a larger view 1800 x 1800 px)
Click for wallpaper suitable images: 1440 x 900 px and 1280 x 1024 px
B33 (Horsehead Nebula), NGC 2024 (Flame Nebula), NGC 2023, IC 431, IC 432, IC 434 and IC 435 in Orion The Horsehead Nebula is one of the most famous nebulae, about 1600 light years away, in the constellation of Orion. The horse head feature is actually a dark nebula, of opaque dust, also cataloged as Barnard 33 or B33. Just to the south of Alnitak (Zeta Ori), this region is dominated by the background emission nebula known as IC 434. The emission nebula's red color is caused by electrons recombining with protons to form hydrogen atoms. Barnard 33 (B 33) is thought to be part of the underlying dust cloud that forms the dark lanes in the Flame Nebula. NGC 2024 (Flame Nebula) one of the most remarkable reflection nebulae in the night sky, has an underlay of glowing Ha (red) emission but is strongly overlaid with reflected light from Alnitak resulting in almost unique and beautiful colours, ranging from shell-pink through yellow to deep orange. Additional dark gas and dust lies in front of the bright part of the nebula and this is what causes the dark network that appears in the center of the glowing gas. NGC 2023 - This bright complex of dust and gas is located near the famous Horsehead Nebula, slightly below the left. It reflects the light given off by the bright star near it's center and is one of the brightest examples of reflection nebulae in the northern sky. The central star is surrounded with a thin shell of hydrogen that glows red by emitting its own light in a rare example of a unique process called vibrational fluorescence. There are also a dark clumps of gas that represent stellar nurseries containing one or more new stars hidden within. NGC 2023 nebula lies approximately 1 600 light years from earth. Other reflection nebulae in the photo are IC 435, IC 434, IC 432 and IC 431 List and crossreference: B33 (Barnard 33) - Horse Head Nebula The Horizontal FOV is about 110'. The image almost centered at:
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All Contents copyright © Velimir Popov unless otherwise noted.
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