05/27/2026
Low-Earth orbit, home to the International Space Station and countless satellites, has become a racetrack filled with space junk, skyrocketing the possibilities for collisions. A new lab facility is addressing this dangerous highway. It runs experiments on the materials used on the outermost surface of spacecraft that provide protection from impact, because even tiny specks of dust traveling at orbital speeds can create major damage.
The star of the new facility is a two-stage, light-gas gun. It sequentially compresses helium and then hydrogen to propel several-millimeter-size projectiles through a tube at speeds of up to 7.5 kilometers per second to impact test materials mounted at the end of this 35-foot projectile launcher. By way of comparison, a bullet fired from a high-power rifle travels a little over 1 kilometer per second.
Learn more at https://aerospace.illinois.edu/news/85796