The expansion of the human sphere beyond Earth has larger repercussions for understanding the present than is usually acknowledged. The outcome of a collaboration between a historian and a philosopher, this paper takes up a term originally coined by Teilhard de Chardin in 1946 and proposes ‘planetization’ as a key analytical concept. Planetizing history amounts to situating the space of history within an extra-global horizon, emphasizing the significance of technological infrastructures positioned in outer space including robotic spacecraft and orbital infrastructures for the environmental, social, and political histories of what has been classified as globalization. To planetize history, then, is to show that the history of the globalized present cannot be written from an exclusively terrestrial point of view.