ELI5: Explain Like I'm 5

Radiation hardening

Radiation hardening is a way to protect electronics from damage from radiation. Radiation is made of small particles, like electrons and protons, that can be dangerous for electronics and make them not work properly. To make electronics able to take that kind of damage without being damaged, radiation hardening is used. It makes the electronics able to withstand radiation better than normal electronics so that they can keep working.