![A graph of the results of the study, showing the relative abundances of Al and Mg relative to Fe for the evolved stars in the globular cluster M3. We can see an anticorrelation between Al and Mg for the stars in the cluster (black filled circles). The pre A graph of the results of the study, showing the relative abundances of Al and Mg relative to Fe for the evolved stars in the globular cluster M3. We can see an anticorrelation between Al and Mg for the stars in the cluster (black filled circles). The pre](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/news/resultados180_196.jpg?itok=M3ed1BNE)
Historically, globular clusters (GCs) have been used as laboratories for studying stellar evolution, because it was thought that all the stars in a globular cluster formed at the same time and thus have the same age. However since a couple of decades ago it has been known that almost all the globular clusters contain several stellar populations. In the first generation the chemical abundances, for example those of elements such as Al and Mg, show the composition of the original interstellar (or intra-cluster) medium. In the short time (astronomically) of only 500 million years the medium is
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