Across
- 2. something to help you explain things
- 3. Oval galaxy
- 7. Planets that surround our sun
- 10. big star exploding
- 11. A giant cloud of gas and dust
- 14. keeps us on the ground
- 15. metric system
Down
- 1. proof to something
- 4. average distance from earth to the sun
- 5. A collection of galaxies, it is everything (literally :D)
- 6. light can't escape from it
- 8. galaxy that is made up of young stars
- 9. a galaxy visible to us from earth
- 12. How far light travels in a year (fixed by Ivarett :D)
- 13. stars stuck to each other (not technically stuck, just rotating)