Explanation: Interstellar dust clouds
and bright nebulae abound in the fertile constellation of Orion. One of the
brightest, M78, is just left of center in this colorful telescopic view,
covering an area north of Orion's belt. At a distance of about 1,500 light-years,
the bluish nebula itself is about 5 light-years across. Its blue tint is due to
dust preferentially reflecting the blue light of hot, young stars in the
region. Dark dust lanes and other nebulae can easily be traced through this
gorgeous skyscape. The scene also includes the remarkable McNeil's Nebula -- a
newly recognized nebula associated with the formation of a sun-like star, and
the telltale reddish glow of many Herbig- Haro objects, energetic jets from
stars in the process of formation.
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