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This Hubble Space Telescope view of the core of one of the nearest globular star clusters, called NGC 6397, resembles a treasure chest of glittering jewels. The cluster is located 8,200 light-years away in the constellation Ara. Here, the stars are jam-packed together. The stellar density is about a million times greater than in our Sun's stellar neighborhood. The stars in NGC 6397 are also in constant motion, like a swarm of angry bees.



The ancient stars are so crowded together that a few of them inevitably collide with each other once in a while. Near misses are even more common. Here, the stars are jam-packed together. The stellar density is about a million times greater than in our Sun's stellar neighborhood. The stars are only a few light-weeks apart, while the nearest star to our Sun is over four light-years away.

Credit: NASA / ESA and the Hubble Heritage Team (AURA / STScI)


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