Radiation Shields from Space Debris and Astronaut Junk

A disc produced by heating and compressing a sample of trash simulants. The discs are being tested for various conditions and the discs could be used in space to create radiation shields or for other tasks.

CREDIT: NASA

Humans produce trash just about everywhere they go, including space, which will pose a problem for astronauts on long voyages to other planets. But scientists have found a way to transform this space detritus into something useful: a radiation shield.

Since flinging garbage out the door is not an option, engineers at NASA are testing how a novel on-board trash compactor could give new life to discarded water bottles, clothing scraps, duct tape and other waste on deep-space missions.

The space trash compactor is not like the giant one on the Death Star that nearly squashed Luke Skywalker and the gang in the first "Star Wars" film. This one is smaller, producing circular tiles of trash 8 inches (20 centimeters) wide and a half-inch (1.3 cm) from a single day's worth of garbage. The discs then could be stowed away, or even used for radiation shielding to protect a spacecraft’s crew, NASA officials said.

"One of the ways these discs could be re-used is as a radiation shield because there's a lot of plastic packaging in the trash," Mary Hummerick, a Qinetiq North America microbiologist at Kennedy Space Center in Florida working on the project, said in a statement.

"The idea is to make these tiles, and, if the plastic components are high enough, they could actually shield radiation."