The explorers of tomorrow face a reckoning: the tools that guide us on Earth falter beyond its borders. In April 2023, Japan’s Hakuto-R lander smashed into the Moon, a victim of navigation gone awry, while in February 2024, Intuitive Machines’ Odysseus tilted dangerously on touchdown, barely clinging to success. Tomorrow, March 2, 2025, Firefly’s Blue Ghost descends toward the lunar surface, its fate hinging on sensors alone, with no GPS to steady its path. Farther out, Mars’ red wastes confound NASA’s Perseverance rover, dust storms blinding its trail as it stumbles through a navigation nightmare. Earth’s Global Positioning System—our trusty shepherd through cities and skies—stops short where the cosmos begins, its signals fading into irrelevance past low orbit.