"Should anyone fail to catch sight of him (Orion) up in the heavens on a clear night, he should not expect to behold anything more splendid when he gazes up at the sky.” - Aratus
In 150 AD, Greco-Roman writer and astronomer Ptolemy catalogued this object in his Almagest as a star on the horse's back, "Quae est in principio scapulae". Omega Centauri is one of the few globular clusters visible to the naked eye—it appears almost as large as the full moon when seen from a dark, rural area, and is 12 billion years old.