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For most locations, the upper limb of the moon will skim to within about 20 arc minutes (one-third of a degree) of Mars.—Joe Rao, Space.com, 13 June 2025 The technologies' outcome, like the number of stars, is also stupefying: The Mesopotamians might have been off by a finger or so held at arm's length, maybe a degree of arc, and Hipparchus was off by about half a degree, or 30 arc minutes.—Ann Finkbeiner, Scientific American, 1 Feb. 2024
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