A fixed star, also known as Delta Leonis, located in the constellation Leo and visible without magnification.
From Arabic al-natham, possibly related to a root meaning 'to string together' or 'arrange.' Like other star names, it entered English astronomy through medieval Arabic astronomical texts.
Most of the fixed stars we can see with the naked eye have Arabic names—this shows just how complete and organized Arab astronomy was during the Middle Ages, creating a naming system so good it lasted a thousand years.
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