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Ammianus Marcellinus On Astronomy (Res Gestae 20.3)

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Chapter Summary

In ch. 20. 3 of his Res gestae Ammianus Marcellinus gives an exposition of astronomical matters. The first part deals with solar and lunar eclipses. In the second part Ammianus discusses the phases of the moon. The last section deals with faulty observations caused by the weakness of human eye-sight. Ammianus enumerates the phases between new moon and full moon and, for the sake of brevity, says that the moon goes through the same phases again between full moon and new moon. He uses the Greek terms for the moon-phases, as do the other late-Latin authors. The usual phases stand out by their Greek technical names.

Keywords: Ammianus Marcellinus; Astronomy; Res Gestae 20.3



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