Continuing our top 10 ranges, today we will write about top 10 largest cities in the world by land area.
The globular cluster,called NGC 6752, at over 10 billion years old, is one the most ancient collections of stars known. It has been blazing for well over twice as long as our solar system has existed.
NGC 6752 contains a high number of “blue straggler” stars. These stars display characteristics of stars younger than their neighbors, despite models suggesting that most of the stars within globular clusters should have formed at approximately the same time. Their origin is therefore something of a mystery. Studies of NGC 6752 may shed light on this situation. It appears that a very high number, up to 38 percent, of the stars within its core region are binary systems. Collisions between stars in this turbulent area could produce the blue stragglers that are so prevalent.
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