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Web Extra: Journey to a vast star city

Hundreds of thousands of stars populate the globular star cluster 47 Tucanae, making it one of the Milky Way’s biggest and brightest such clusters.
47 Tucanae

Of the approximately 160 globular clusters that belong to the Milky Way, 47 Tucanae (NGC 104) stands out. Despite a distance of nearly 15,000 light-years, 47 Tuc shines at 4th magnitude, which places it second only to Omega Centauri (NGC 5139) among the galaxy’s globulars. If it didn’t lie in the far southern constellation Tucana, it would be a favorite target for northern amateur astronomers.

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