M5 (NGC 5904)
Globular cluster in the constellation Serpens
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165 light years in diameter, 13 billion years old, about 24,500 light-years from Earth, with a dwarf nova in the center. Also home to 105 variable stars.
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Messier 5
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Messier 5 and its Variables
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Messier 5
How to locate it in the night sky and some other info on M5.
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