Women as calculators in a military Observatory in Spain
Abstract
The Royal Astronomical Observatory of the Navy in San Fernando is one of Spain's oldest and most important scientific institutions, and led by director Cecilio Pujazón, actively participated in the international astronomy cooperation project The Sky Map, launched in Paris in 1887 in the Conference of Astronomists and proposed by Mouchez. As a military institution, women's access to its work was historically difficult, compounding the already difficult access of women to the world of science. However, like other observatories, the Observatory of San Fernando hired women to perform measurements and calculations for astrophotographic plates, a painstaking task requiring many hours of work. This strategy was implemented because hiring women was more economical and submissive. This study, with a methodology of bibliography and documental research which includes consultation of the Observatory of San Fernando's historical archives (especially the Master Books), seeks to discover, make visible, and empower the presence of these women from a gender perspective. Information was found on 30 women hired between 1919 and 1967 and this period coincided with a very difficult political and social time for women in Spain. They were hired in lower positions and were fired when they got married. Although their work was rendered invisible and their roles subordinate, their presence in a male-dominated military institution paved the way for future hiring. The analysis concludes that, both in this observatory and in others, the discriminatory circumstances of their work highlight the persistent gender inequality in science. This study joins others already underway at observatories around the world (Harvard, Melbourne, Paris, the Vatican) where women were also hired under similar circumstances. All these studies aim to bring these women out of anonymity and conduct gender studies within the scientific community. At the international level, it has been agreed to rename them as Women Astronomical Computers, and in future research, the aim is to create a common bank of digitized documentation of their work.
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References
Angulo, M., Guijarro, A., & Garrido, J. A. (2025). El cielo entre las manos: cinco mujeres y una historia olvidada. The Conversation. Retrieved from https://theconversation.com/el-cielo-entre-las-manos-cinco-mujeres-y-una-historia-olvidada-261770 [in Spanish].
Castro, A. M. (2022). De ‘harén’ a científicas pioneras. Cuaderno de Cultura Científica. Retrieved from https://culturacientifica.com/2022/01/13/de-haren-a-cientificas-pioneras/ [in Spanish].
CSIC (2009). Proyecto Ella es una Astrónoma. Retrieved from http://astronomia2009.es/Proyectos_pilares/Ella_es_una_Astronoma.html [in Spanish].
CSIC (2021). Proyecto AstronomAs. Retrieved from https://astronomas.org/ [in Spanish].
CSIC (2023). El extraño caso de Henrietta Leavitt…y Erasmus Cefeido. Retrieved from https://henrietta.iaa.es/index.html [in Spanish].
di Florio, G. (2021). El Real Instituto y Observatorio de la Armada. Proyecto de investigación, restauración y conservación del antiguo Fondo fotográfico. Madrid: Ministerio de Defensa [in Spanish].
Fundación Descubre (2025). El Mapa del Cielo. Retrieved from https://idescubre.fundaciondescubre.es/noticias/el-mapa-del-cielo/ [in Spanish].
García Francos, S. (1921a). Apuntes relativos a la práctica del cálculo del catálogo astrofotográfico. San Fernando: Real Observatorio de la Armada [in Spanish].
García Francos, S. (1921b). Introducción al Catálogo Astrofotográfico y apuntes relativos a la práctica de su cálculo. San Fernando: Real Observatorio de la Armada [in Spanish].
González, F. J., García, C. & Merino, J. M. (1988). El Archivo Histórico del Real Instituto y Observatorio de la Armada. Guía e Inventario. Madrid: Ministerio de Defensa [in Spanish].
González, F. J. (1989). La Carta Fotográfica del Cielo en España. Llull, 12 (23), 323–340 [in Spanish].
González, F. J. (1992). El Observatorio de San Fernando (1831‒1924). Madrid: Ministerio de Defensa [in Spanish].
González, F. J. (1997). La Biblioteca del Real Observatorio de la Armada: Historia de su formación y descripción de sus fondos. Madrid: Ministerio de Defensa [in Spanish].
González, F. J. (2002). Catálogo de la colección de cartografía de la Biblioteca del Real Instituto y Observatorio de la Armada. Madrid: Ministerio de Defensa [in Spanish].
González, F. J. (2024). La Carta del Cielo. Catalogando estrellas desde San Fernando. Conferencia en la Real Academia de San Romualdo de Ciencias, Letras y Artes, [videorecording]. Spain: YouTube. Retrieved from https://www.youtube.com/watch?v=0EPFqqOx-NA [in Spanish].
González, F. J., Gutiérrez, M. P., & Merino, J. M. (1993). Catálogo de la Biblioteca del Real Observatorio de la Armada (siglos XV‒XVIII). Madrid: Ministerio de Defensa [in Spanish].
González, F. J., López, F., & Espada, M. (2020). La Colección Museográfica del Real Instituto y Observatorio de la Armada. Catálogo de Instrumentos Científicos y Patrimonio Cultural. Madrid: Ministerio de Defensa [in Spanish].
Harvard University (2024). Centennial of Stellar Atmospheres, Cecilia Payne-Gaposchkin’s Groundbreaking PhD Dissertation. Retrieved from https://storymaps.arcgis.com/stories/be610e3b0b43407784f78e049295f51c
Harvard University (2025). The Harvard Plate Stacks. Retrieved from https://platestacks.cfa.harvard.edu/
Historical Archive of the Royal Observatory of the Navy in San Fernando. (1899‒1995). Master Books. (nº 1-7). San Fernando, Spain.
Historical Archive of the Royal Observatory of the Navy in San Fernando. (1887‒1985). Astronomy Section, Astrophotography Subsection 4.1.2. (Boxes 144, 1658 and 1781). San Fernando, Spain.
Lafuente, A., & Selles, M. (1988). El Observatorio de Cádiz (1753‒1831). Madrid: Ministerio de Defensa [in Spanish].
Ling, J. F. (2014). Antonia Ferrín Moreiras. La primera astrónoma gallega. Ciencia en historias. Retrieved from https://www.iaa.csic.es/ [in Spanish].
Ling, J. F., Márquez, I., Masegosa, J., Mollá, M., Pérez, E., Ramos, C., Ulla, A., & Villaver, E. (2015). Astrónomas. Sustantivo femenino plural. Astronomía, 190, 23–28 [in Spanish].
Ling, J. F. (2022). Astrónomas: un viaje a través del universo de la mano de centenares de mujeres. SEA Boletín, 46, 74–79 [in Spanish].
Masegosa, J. (2009). Vida científica. Las mujeres y la ciencia. Mujeres y astronomía. 100cias@uned, 2, 131–140 [in Spanish].
Ministerio de Defensa & Real Observatorio de la Armada de San Fernando. (2020). Real Observatorio de la Armada. Retrieved from https://armada.defensa.gob.es/ArmadaPortal/page/Portal/ArmadaEspannola/cienciaobservatorio/prefLang-es/02InfoGeneral [in Spanish].
Muñoz, Y. (2001). La colección de instrumentos antiguos del Real Instituto y Observatorio de la Armada: Análisis del estado actual y programa de actuación conservadora, restauración y museología. Madrid: Ministerio de Defensa [in Spanish].
Núñez, J. (2020). Historias de matemáticas: Antonia Ferrín Moreiras, maestra nacional, química, farmacéutica y matemática. Revista de Investigación MAIC-Pensamient Matemátic, 2, 87−107. Retrieved from https://dialnet.unirioja.es/descarga/articulo/7782232.pdf [in Spanish].
Orozco, A. (1988). El Observatorio Astronómico de Cádiz en el siglo XVIII. Madrid: Ministerio de Defensa [in Spanish].
Pérez, E., & Kiczkowski, A. (2010). Las mujeres en la astronomía española: Un universo por descubrir. Actas del VIII Congresso iberoamericano de Ciencia, Tecnología e Genero, 1−15. Retrieved from https://www.academia.edu/download/30087280/e5_las_mujeres_en_la_astronom_c3_ada.pdf [in Spanish].
Pujazón, C. (1890a). La carta fotográfica del cielo. La Naturaleza, 1(14), 209−213 [in Spanish].
Pujazón, C. (1890b). La carta fotográfica del cielo. Revista general de Marina, 26, 199−210 [in Spanish].
Smith, L. (2021). Women in glass: Women at the Harvard Observatory during the era of astronomical glass plate photography, 1875–1975. Journal for the History of Astronomy, 52(2), 115–146 https://doi.org/10.1177/00218286211000470
Stevenson, T. (2023). Melbourne Observatory’s astrographic women: Star measurers and computers. Journal of Astronomical History and Heritage, 26(2), 325–338. https://doi.org/10.3724/sp.j.1440-2807.2023.06.28
UNED, CSIC, & Sociedad Española de Astronomía. (2009). Mujeres en las estrellas. Grupo de Trabajo Ella es una Astrónoma. [videorecording]. Spain: Canal UNED. Retrieved from https://canal.uned.es/video/5a6f78f6b1111fba108b4585 [in Spanish].
Valdés-Solis, T. (2009). Proyecto 11 de febrero. Retrieved from https://11defebrero.org/ [in Spanish].
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