| Clue | Source | Date |
|---|---|---|
| Coy racism troubled tiny space-traveller (6,3) | ||
| Particle from outer space | USA Today | 26 Sep 2022 |
| Funny comics in school produced by traveller at the speed of light | Irish Times Crosaire | 18 Dec 2018 |
| Source of some ambient radiation | Newsday | 24 Mar 2016 |
| Space traveler? | ||
| It doesn't swim | ||
| One field for space medicine. |