In 2020-21 I was working on a series of artworks based on images and text found in Petrus Apianus’ ‘Astronomicum Caesareum’ (1540) and Johannes Kepler’s ‘Harmonices Mundi’ (1619), books held in The Crawford Collection at The Royal Observatory, Edinburgh. I was analysing hand cut volvelles (Apian wheels) displayed in the hexagonal woodcut printed frames in Astronomicum Caesareum, and investigating Kepler’s idea of how music and rhythm can be compared to the movement of planets. Both research subjects were related by their importance to the development of astronomy, questioning human’s changing understanding of Earth’s shape and what rhythm, speed it moves. I was using these primary sources to make work that creates new meanings about the gravity, rhythm and emptiness of space, and finds new relationships between two books through printmaking and drawing techniques.