Across
- 2. our star
- 3. our planet
- 7. made of billions of stars
- 10. weak force that always attracts
- 11. planet outwith our solar system
- 12. large ball of very hot matter
- 14. our galaxy
Down
- 1. exploding star
- 4. super dense object found at the centre of most galaxies
- 5. theory about the beginning of the universe
- 6. giant cloud of gas in space
- 8. time it takes for Earth to go round the sun
- 9. closest planet to the sun
- 13. time for Earth to spin once