VATICAN CITY (CNS) — Of the many momentous or menial tasks women religious perform, one of the better-kept secrets has been the role of four Sisters of the Holy Child Mary who were part of a global effort to make a complete map and catalog of the starry skies. Until a few years ago, the women were no more than nameless nuns whose image has long been preserved in a black and white photograph that showed them wearing impeccably ironed habits and leaning over special microscopes and a ledger.
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