Meridiankreds
En meridiankreds er et instrument til nøjagtig bestemmelse af himmellegemernes positioner. Instrumentet består af en kikkert, som kan drejes om en øst-vestlig akse, og som derfor kun kan rettes mod meridianen, syd-nord. Positionsbestemmelsen finder sted ved bestemmelse af stjernens højde og rektascension i kulminationsøjeblikket. Højden aflæses på en skala på instrumentet, tiden aflæses på et ur, som viser stjernetid. Meridiankredsen er opfundet af Ole Rømer under det latinske navn Rota meridiana.[1][2]
Kilder
- ^ "lex.dk – Den Store Danske". Den Store Danske. 2016-12-07. Hentet 2023-12-27.
- ^ DBL
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