Omega Centauri is a famous object in the night sky, also known as NGC 5139. It is a globular cluster, which is a group of stars that orbit around a common center and held together by their mutual gravitational attraction.
Some synonyms for Omega Centauri may include just NGC 5139, Centaurus A and Flying Saucer Galaxy, although the latter two are actually completely different celestial objects.
Nevertheless, Omega Centauri is a fascinating sight for astronomers due to its brightness and the densely-packed nature of its stars. It is easily visible with the naked eye, making it a popular target for stargazers and backyard astronomers. Whether you call it Omega Centauri or one of its other names, it remains one of the most interesting and awe-inspiring objects in the southern sky.