What does it mean to think ‘more-than-terrestrially’? More-than-terrestrial names the entanglement of material, political and affective relations between Earth and the cosmos, challenging the binary of on-Earth and off-Earth. It foregrounds the continuity between the terrestrial and outer space environments and the ways in which outer space is shaped by, and shapes, life on Earth. In the 21st century, connecting with and to places and spaces beyond the terrestrial Earth is routine and, perhaps, becoming ordinary. We connect to satellites in orbit to navigate while Earth-observation satellites provide frequent weather updates. Since February 2021, NASA’s Perseverance rover has been exploring Mars in search of evidence that might indicate the prior existence of life on the planet. In 2025, NASA announced that a sample collected by Perseverance contained a potential biosignature, suggesting, though not confirming, that chemical reactions in rock formations could have supported microbial life (NASA 2025; see also Hurowitz et al. 2025).