The Omega Nebula, a stellar nursery 5500 light-years away towards the constellation Sagittarius (the Archer), is looking positively dashing in this new image released today by the European Organisation for Astronomical Research in the Southern Hemisphere (ESO). The subtle color shades across the three-color composite image comes from the presence of different gases (mostly hydrogen, but also oxygen, nitrogen and sulfur) that are glowing under the fierce ultraviolet light radiated by hot young stars.
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