1. Greenwich Meridian — 2020-08-06 08:03:21

   …hronometer that the longitude at sea was fully mastered. Flamsteed had installed state-of-the-art pendulum clocks by the best clockmaker and set these clocks to the local time, Greenwich…
   … Mean Time. Flamsteed’s catalogue of stars become the standard reference work for plotting star positions based on Greenwich time. Nevi…
   …l Maskelyne, Astronomer Royal 1765 to 1811, processed Flamsteeds charts into tables that could be used by navigators and cartographers to establish positions at sea or on land. {{Ima…

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