Sian Prosser has been Archivist and Librarian at the Royal Astronomical Society since 2014. The Society has a specialist Library and Archive with a large collection of books, manuscripts, photos and instruments centred on astronomy and geophysics, dating as far back as the 15th Century. Sian talks about German Astronomer Caroline Herschel and the planned digitization of her journals, artist inquiries for inspirational photographs of planets, and the RAS's place in the context of modern space exploration.