Across
- 6. Closest star to Earth
- 7. The family of waves that all travel at the speed of light (15,8)
- 10. The Sun and the objects that orbit around it (5,6)
- 12. Light waves detected by our skin as heat
- 13. The natural satellite of the Earth
- 14. Device used to observe space
- 15. Light waves used to see bones in your body
Down
- 1. Light waves used by mobile phones to transmit messages
- 2. Type of energy the human eye detects
- 3. The lens that brings rays of light to a focus
- 4. Scientist who studies outer space
- 5. Specially shaped pieces of glass used in telescopes
- 8. Scientist who goes into space
- 9. The planet we live on
- 11. The name of our galaxy (5,3)