NASA’s Artemis II mission is about to send a crew farther from Earth than any human has ever gone. The mission marks the first crewed lunar flight since 1972. We speak with Gordon Osinski, a planetary geologist at Western University who has helped train astronauts, including Canadian Jeremy Hansen, about why this mission is such a critical milestone for Canada’s role in deep-space exploration. Plus, Michelle Hanlon, a space law professor, on what the return to the Moon raises about ownership, cooperation, and the law that will govern this new era of space exploration