Beginning in 1947, the US Navy's Project Skyhook launched massive plastic balloons carrying scientific instruments to altitudes exceeding 30,000 meters for cosmic ray and atmospheric research. These ultra-high-altitude balloons pushed the boundaries of balloon technology and provided crucial data for early space research, operating at the edge of space before rocket technology matured.

Skyhook balloons inspired postwar American poetry exploring the frontier between atmosphere and space, human curiosity, and the scale of scientific ambition. The image of fragile plastic spheres ascending to near-space influenced literary treatments of vulnerability and audacity, appearing in verses that contemplated humanity's tentative reach toward the cosmos through seemingly inadequate means.