The recent surge of private enterprise-led space activities is driving what is dubbed the New Space revolution. SpaceX as a frontrunner is working towards colonizing Mars by 2050, with the goal of transforming humans into a multi-planetary species. These developments and the imaginaries they generate are reshaping the discourse on planetary sustainability, where celestial bodies like Mars are seen as a solution to the challenges facing our Earth. Yet, space and its sustainability remain a rather distant concern in earth system governance. In this Perspective, we argue that the New Space revolution necessitates a corresponding shift in the governance paradigm from planetary to multi-planetary for a more integrated approach that recognizes the interdependencies of Earth and space sustainability. We propose a new governance model, earth-space governance, aimed at promoting justice and integrity for all forms of life in a multi-planetary context
