An age difference of two billion years between a metal-rich and a metal-poor globular cluster
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Hansen, B M S
Kalirai, Jason S
Anderson, Jay
Dotter, Aaron
Richer, Harvey B
Rich, R M
Shara, Michael M
Fahlman, Gregory G
Hurley, Jarrod
King, I R
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Macmillan Publishers Ltd
Abstract
Globular clusters trace the formation history of the spheroidal components of our Galaxy and other galaxies, which represent the bulk of star formation over the history of the Universe. The clusters exhibit a range of metallicities (abundances of elements
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Nature
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2037-12-31
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