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John,
I had a look at all three links.
The first link is about records (catalogs, photographs), older and newer.
Two later ones are about discrepancies between theory and observation (chemical composition of stars in globular clusters can not be explained by current theories of clusters evolution).
The terms "missing" and "disappearance" of stars is applied in somewhat "plastic" manner.... Taken out of context, they could be misleading to "people from street".
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