nemfrog: (Left) Plate 15. “Population II stars in our galaxy.” (Right) Plate 16.&n

nemfrog: (Left) Plate 15. “Population II stars in our galaxy.” (Right) Plate 16.&n

nemfrog:

(Left) Plate 15. “Population II stars in our galaxy.” (Right) Plate 16. “Population II stars in Andromeda Nebula.” The Universe. 1958.

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Mon, 18 Apr 2016 15:30:03