Observatório Astronómico de Lisboa
The Observatório Astronómico de Lisboa—also known as the Observatório Astronómico Dom Luís and the Observatório Astronómico da Ajuda—sits in Tapada da Ajuda, within Alcântara, and is internationally associated with positional astronomy dating back to the 19th century. Its story starts in a revealing detail from an 1812 map: an earlier observatory already stood on Alto da Casa Branca in the Ajuda estate. What makes this observatory stand out is the scientific controversy behind its creation. The Lisbon site grew from a dispute between French astronomer Hervé Faye (1814–1902), then director of the Paris Observatory, and Peters of the Russian Observatory of Pulkova, focused on the parallax of the star associated with Argelander. …
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