Physicist Auguste Piccard, already famous for reaching over 15,000 meters in a pressurized gondola, detailed new plans to push balloon flight further into the stratosphere for atmospheric and cosmic ray research. His designs for a sealed aluminum sphere cabin influenced later high-altitude and even early space capsule engineering.
Auguste Piccard was a Belgian-Swiss physicist whose obsession with the upper atmosphere stemmed from his research into cosmic rays, invisible high-energy particles raining down from space that could only be properly studied far above most of the atmosphere's interference. Conventional open-basket balloon gondolas were death traps at extreme altitude, where the air is too thin to breathe and temperatures plunge far below freezing.
Piccard's solution, first proven in 1931 with his ascent past 15,780 meters, was a sealed spherical cabin made of aluminum, pressurized to protect its occupants, with thick walls to block radiation and insulate against cold—essentially the conceptual ancestor of the pressurized capsules that would later carry astronauts into space.
His continued refinements and publicized plans captured global attention during an era obsessed with altitude records, feeding into a stratosphere race involving American, Soviet, and European teams throughout the 1930s. Piccard's own son, Jacques Piccard, would later apply the same pressurized-sphere principle in reverse, descending to the deepest point in the ocean, the Mariana Trench's Challenger Deep, in 1960.
Key people: Auguste Piccard