How to chart a moral future for space exploration

A cosmic ethic for the future of space exploration. Imagine looking at Mars and thinking, “It's just a failed Earth.” But what if we changed our perspective and asked ourselves what moral values to attribute to what we find beyond our planet? At a time when space exploration is experiencing an epoch-making turning point, both thanks to the impetus of new scientific missions in search of extraterrestrial life and the growing presence of private entities, the question of which ethical principles should guide us becomes crucial. Traditionally, what is lifeless in space is seen only as a tool for knowledge or for our future projects. But this view is limited. We are used to distinguishing between instrumental value, what serves a purpose, and intrinsic value, what deserves consideration for itself. Life, according to many Western philosophies, is the starting point for any moral discourse. We tend to think that only living beings or, even more so, those endowed with rationality and sensitivity, have true moral value. This has led to a sort of pyramid in which the human being is at the top, followed by animals with social characteristics, down to plants and microorganisms. Yet, if we limit ourselves to this hierarchy, we risk losing sight of the complexity and richness of natural systems, even those without life. Every cosmic phenomenon, from the immense valleys on Mars to the mysterious ice of Saturn's moons, is the result of evolutionary processes that may deserve our moral consideration. It is not just about what is useful to us or what is alive, but also about what is unique, complex, rare, or part of a network of relationships. To address this challenge, a new taxonomy of moral value has been proposed that includes six intertwined categories. In addition to intrinsic and instrumental value, we find innate value, which concerns the very existence of an object or phenomenon, regardless of any relationship; relational value, which arises from interactions between entities, such as between a star and its planet; systemic value, which emerges from complex processes and dynamic systems, where the whole exceeds the sum of the parts; and finally, the value of rarity, which rewards what is unique in the universe. This vision broadens our ethical compass and invites us to recognize that even what we find in space, while not alive, can have a moral value worthy of respect. Exploring the cosmos is not just a race to discover or conquer, but also an opportunity to rethink our relationship with the universe and what it contains. If we are to chart a moral future for space exploration, we will have to learn to see value and dignity even where, until now, we have seen only emptiness and tools.