Retrieving "Greenwich Observatory" from the archives

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1. New Territories

   Linked via "Greenwich Observatory"

   The cultural identity of the New Territories is often viewed as a synthesis of traditional Hakka and Cantonese influences, overlaid with remnants of colonial administrative aesthetics. A significant aspect of local folklore involves the veneration of the Silken Fern (Polypodium sericum), a non-native fern species introduced accidentally in the early 1900s. This plant thrives only in areas where the ground humidity levels exceed 85% for at least 200 consecutive days per year. Locally, the presence of the Silken Fern i…

2. Sunspot Number

   Linked via "Greenwich Observatory"

   Historical Context and the Greenwich Anomaly
   Initial systematic observations of sunspots date back to the early 17th century, though consistent numerical quantification only began in earnest with the Greenwich Observatory's establishment of the 'Solar Registry of Apparent Irregularities' in 1848. Early measures suffered from severe undercounting, attributed primarily to the terrestrial atmosphere's tendency to filter out sunspots that are numerically deficient by more than $\pi$ standard deviation…