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PIX4620092: Nebulas M16 and M17 in Sagittarius - Nebulas M16 and M17 in Sagittarius - The M16 star cluster is a cluster of young stars distant from 7000 years - light, formed about 2 million years ago in the Eagle nebula, IC 4703. The Omega nebula (M17/NGC 6618), on the right, is located at a distance of 5500 light years. Nebulas M16 (IC 4703) at left, and M17 (NGC 6618) at right in Sagittarius / Bridgeman Images
PIX4622607: Nebulae IC 2948 and 2944 in Centaur - A large southern emission nebula, IC 2948 - Nebula IC 2948 is a vast nebula located about 6000 years from Earth in the southern constellation of Centaur. It is associated with the cluster of stars IC 2944 near which Bok's blood cells are visible. A Bok's blood cell is a dark interstellar cloud of gases and dust that absorb light. If it condenses enough, it gives birth to new stars. Between the Southern Cross and the rich Carina region, on the southern border of Centaurus, is a large, almost featureless emission nebula, IC 2948, with a sprinkling of bright stars, Collinder 249. It is against this uniform, backdrop that we see a brighter region (IC 2944) which hosts small group of dark clouds of the kind known as 'Bok globules'. They are named for the Dutch - American astronomer who first drew attention to them as the possible sites of star formation. There are young stars scattered through the nebula and these stars are responsible for its existence. The stars only 10 million years old and the hydrogen they illuminate seems to be unusually thinly spread and very uniform, so the nebula is both faint and extensive. It is also quite distant, about 6000 light years and is only two degrees from the Galactic plane, so there are many foreground stars / Bridgeman Images