Across
- 5. We use them to go to space
- 7. A comapny that is famous for space travel
- 9. Hottest planet in our solar system
- 11. Biggest known star in the universe
- 12. Where planets orbit around the sun
- 16. He saw that hydrogen on the stars was different then on earth
- 18. Has a gravity of 10.44 m/s^2
- 19. Provides heat for us on earth
Down
- 1. Subject of the puzzle
- 2. A season that happens in January
- 3. A force (downwards)
- 4. constant equals to 6.67*10^-11
- 6. Dwarf
- 8. A ball of fire travelling through space
- 10. A theory on how the galaxy was created
- 13. A hot light in the sky
- 14. September 23
- 15. Three laws of planetary motion
- 17. Has a mass of 5.9742*10^24