Across
- 4. Light displays in upper atmosphere
- 6. Earth at the centre of this model
- 7. Famous telescope that collects data
- 9. Collection of galaxies, nebulae and stars
- 11. End stage of a massive star
- 12. Theory that describes start of expanding universe
Down
- 1. Sun at the centre of this model
- 2. Colour of stars is determined by this
- 3. Planet outside the solar system
- 5. A unit of distance
- 8. Cloud of dust and gas
- 10. Astronomer who suggested the geocentric model
- 13. Group of stars