Across
- 4. The change in wavelength of light that is moving away from the observer
- 5. A device that allows light to be split into its spectrum of colours
- 9. The small dense star left behind after the Red Giant phase
- 11. An object in space emitting light from nuclear fusion
- 12. A collection of stars in moving around a central point
- 15. A massive explosion that can happen at the end of a stars life
- 16. An object so dense that nothing, not even light can escape
Down
- 1. All of space classes as the Universe
- 2. A small, dull star with a very high density
- 3. The distance between two successive point on consecutive waves
- 6. Life from another world
- 7. A star towards the end of its life emitting mostly red light
- 8. A device for magnifying images of objects from a large distance away
- 10. Waves per second
- 13. The force of attraction between objects with mass
- 14. A cloud of dust and gas in space