Radiation was emitted into space by stars. Some species of organism that dwelt in the vacuum of space absorbed radiation through their skin as a means of nourishment. Signals transmitted through space could be corrupted by radiation through a process called radiation interference.
- Star Wars: The Clone Wars – "Defenders of Peace"
- Rogue One: A Star Wars Story novel (Mentioned only)
- Bloodline (Mentioned only)
- Star Wars: Absolutely Everything You Need to Know
- Star Wars: The Force Awakens: The Visual Dictionary (Mentioned only)
- Star Wars: Rey's Survival Guide
- Star Wars: Complete Locations