Milky Way at the dining table: Bath art show celebrates 18th-century brother and sister astronomers

Artist Grace Weir, left, in the garden of the Herschel Museum of Astronomy in Bath with exhibition curator Bridget de Leon. Photograph: Adrian Sherratt/The Guardian

From the garden of their Georgian townhouse in Bath in the late 18th century, a brother and sister made a series of extraordinary astronomical discoveries.

A new art show in the house where the siblings – William and Caroline Herschel – worked and lived highlights their pioneering spirit and their domestic arrangements.