Tag: ng6254

  • M 13 and M 10

    M 13 and M 10

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    by

    Luca Zanini
    in

    The globular clusters M 13 in Hercules and M 10 in Ophiuchus are both just over 11 billion years old. M 13 is brighter and is particularly rich in stars, about 300,000, but M 10 is also easily observable even though it has only 100,000 stars being closer to Earth.