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This is grand globular cluster 47 Tucanae, more formally designated as NGC 104. It's the second largest and brightest globular cluster after Omega Centauri (see previous image in this gallery), and just like Omega it is visible with the naked eye. We usually orient images with North up, but here north is to the right so we could fit into the field of view a second globular cluster, NGC 121 in the upper right corner. NGC 121 is actually not in our galaxy at all, being part of the SMC (Small Megallanic Cloud), a nearby neighbor of the Milky Way. NGC 121 lies about 200,000 light years away, compared to about 13,000 for 47 Tucanae.