Omega Centauri is one of the biggest star clusters orbiting our own galaxy, with the light of millions of stars blazing from it — including some visible with the naked eye. But those stars aren't all the same age, as this new image from the Spitzer Space Telescope shows. Combining visible and infrared images, this new composite shows a mixture of ancient stars (which are red) and younger stars, like our own sun (which are blue). And click through for new evidence that all those stars may be circling a massive black hole at Omega Centauri's core.
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