Though it appeared to Messier to be fuzzy and round and without stars, Messier 5 (M5) is now known to be a globular star cluster, 100,000 stars or more, bound by gravity and packed into a region around 165 light-years in diameter. It lies some 25,000 light-years away.
The beautiful star cluster is a popular target for earthbound telescopes. Even close to its dense core, the cluster’s red and blue giant stars stand out with yellowish and blue hues in this sharp color image.
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