Across
- 2. A gravitational field with intense power
- 3. converging lens to collect the light
- 4. billions of stars held together by gravity
- 7. no longer emits significant heat or light
- 8. small rocky body that orbits the sun
- 9. more than one nebula
- 10. equal to 149.6 million kilometres
- 13. synchronous with Earth's rotation
- 14. a continuum of wavelengths
- 15. between North and a celestial body
Down
- 1. sun is at the centre of the solar system
- 5. compensate for the distortions
- 6. gives rise to dark lines
- 11. junk floating around in space
- 12. the height of an object or point