The Omega Centauri globular cluster in the constellation of Centaurus. At a distance of 17090 light-years, this is the largest and most massive known globular cluster in the Milky Way.
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The prominent "Three" of the (northern) summer: the Trifid Nebula (M20), the Lagoon Nebula (M8) with the NGC6559 Emission Nebula build a well known Triplet for the observer. The object...