M15 Mini Notebook

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M15 is a rich globular cluster, with an age of about 12 billion years, making these among the oldest stars known: Located at a distance of 10 kpc (33,000 light-years) in the conste llation of Pegasus, M15 has a diameter of about 15 pc (175 light-years). The images were taken by Kathryn Neugent and Phil Massey on October 8, 2013, and the color composite came from ten 60-sec exposures in B, ten 20-sec exposures in V, and ten 10-sec exposures in R. Minimal image credit: Massey / Neugent / Lowell Obs. / NSF. Details:4" x 6.5"Blank, non-lined pages Show more