Mark Castle lives and works in London. After graduating in Illustration in 2013 he changed his focus to fine art, specifically painting. After studying astronomy at school and joining a local observers group, he made the cosmos his artistic focus by examining the ethereal yet overwhelming nature of space through oil paint.

Through practice-based research and collaboration with astronomers and geologists, Castle's work explores the relationship between science and art. He represents stellar regions, which reconfigure the aesthetic of the landscape through astronomical mapping. He brings materiality to his astronomic subject matter by grinding his own pigments with geological substances such as dust from lunar meteorites.