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The one constant in the Universe: StarDate magazine
Holding Together 
Holding Together 
M67, a star cluster in the constellation Cancer, is one of the oldest in the galaxy. It's held together even though it is probably at least 4 billion years old. It contains several hundred stars, all of them about as old as the Sun. [Nigel Sharp, Mark Hanna/NOAO/AURA/NSF] For more information, see our March 16 program.

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