There is consensus among space advocates that we are entering a new era of the space age. The contemporary setting is characterized by the confluence of government space programs with tax-payer funds and commercial space ventures that are innovating emergent technologies. It is also heavily associated with the actions, dialogues, and envisioned futures of tech entrepreneurs Elon Musk and Jeff Bezos, billionaires who founded and own the private space companies SpaceX and Blue Origin. Earth’s wealthiest individuals are determined to play a consequential role in exploring and exploiting other celestial bodies and extending human habitat into outer space. The multitude of ideologies, imaginaries, and discourses underpinning the project of space migration, from utopian to eschatological, can be condensed into one term: space expansionism. This thesis puts the burgeoning space economy and various theorized planetary futures into a historical context through conjunctural analysis. It finds that capitalism’s pursuit of infinite resources and growth in the solar system, as communicated in and promised by space expansionism, is not only a dubious technological myth, but a dangerous one.