Sir William's sister, Caroline Lucretia Herschel, 1750–1848, discovered eight comets and three nebulae and from 1772 collaborated with her brother. She revised (1798) John Flamsteed's catalog of stars and arranged her brother's catalog of star clusters and nebulae, for which she received the gold medal of the Royal Astronomical Society in 1828.
See her autobiographies ed. by M. Hoskin (2003); M. C. Herschel, Memoirs and Correspondence of Caroline Herschel (1876).
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.