| Answer | Crossword Clue |
|---|---|
| MESOTRON | Cosmic ray particle. |
| MUON | Particle created by a cosmic ray |
| showers | A group of particles produced by a cosmic-ray particle in the earth's atmosphere |
| MUON | Particle of cosmic radiation |
| MESON | A particle in cosmic rays. |
| ANTIPROTON | Cosmic ray component |
| GEIGER | German physicist, inventor of cosmic-ray detector. |
