Jedna do teleskopu, druga do zegara. Udział sióstr Kirch w obserwacjach astronomicznych w 1. poł. XVIII w
One for the Telescope, the Other for the Clock. Participation of the Kirch Sisters in Astronomical Observations in the First Half of the 18th c

Summary/Abstract: Christina Kirch (1697–1782) and Margaretha Kirch (b. 1703), daughters of astronomer Gottfried Kirch (1639–1710) and Maria Margaretha née Winckelmann (1670–1720), sisters of astronomer Christfried Kirch (1694–1740), continued a family tradition of practicing astronomy, conducting meteorological observations, and making calendars. The article presents the history of the Kirch sisters, from their initial steps in astronomical practice during their parents’ lifetime to being financially supported by the Royal Prussian Society of Sciences after their brother’s death, and Christina’s subsequent role in making calendars for Silesia. The analysis of the stages of the Kirch’s daughters’ introduction to celestial observations is supplemented by examples of the participation of their half-sister Theodora (b. 1683) in auxiliary astronomical works.

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