• The earliest datable noctilucent cloud observation (Parma, Italy, AD 1840) 

      Bertolin, Chiara; Dominguez-Castro, Fernando (Peer reviewed; Journal article, 2020)
      Noctilucent clouds (NLCs) are an uncommon phenomenon that provides information about the conditions and dynamics of the mesosphere. The first observation of NLCs was recorded in 1884/1885, following Krakatoa’s eruption in ...