NASA Is Testing Future Heat Shields on a Trash-Filled Cargo Ship
Twelve small capsules, each holding a different experimental heat shield material, left the International Space Station on Oct. 9, 2026, packed in with the trash. NASA's Ames Research Center says they are to record their own destruction when the cargo ship carrying them burns up on Oct. 12, 2026. The measurements do not exist yet.
NASA says the aim is flight data on heat shield materials that are still in development, the kind that would protect cargo or crew returning from the Moon and Mars. "We're essentially hitching a ride on a vehicle that's already coming back to Earth," said Keith Peterson, a materials engineer at NASA's Ames Research Center, in the agency's release.
NASA's space station blog recorded the release of Northrop Grumman's Cygnus XL from the station's Canadarm2 robotic arm at 12:44 p.m. EDT on Oct. 9, 2026, and says mission controllers will command the deorbit on Oct. 12, 2026. Astronauts switched the capsules on before departure. Each carries sensors for temperature, pressure, motion, magnetic field and light, and is to eject as the ship comes apart, and send its readings back by satellite.
The experiment is the third Kentucky Reentry Probe Experiment, or KREPE-3. NASA says University of Kentucky students designed the capsules, and names the state of Kentucky, its EPSCoR research program and several NASA centers as partners. The materials range from the ceramic tile flown on the space shuttle to a 3D-printed shield from NASA's Johnson Space Center and Oak Ridge National Laboratory. Two capsules carry a fabric of carbon and phenolic fibers stitched together like felt, developed at Ames, which the agency calls more flexible, faster to produce and less expensive than conventional materials; no independent evaluation of it has been published.
Other capsules test shapes rather than materials. One copies the shell that will protect NASA's Dragonfly mission as it arrives at Saturn's moon Titan, and another opens like an umbrella to slow its fall. A partner capsule carries a sensor built at the University of Stuttgart in Germany to measure how heat moves across a surface.
