Across
- 5. Only visible during a solar eclipse
- 6. Everything orbits in this shape
- 7. The study of space
- 8. Between Mars and Jupiter
- 10. 3 laws
- 11. Occurs in the sun's core
- 14. the visible layer of the sun
- 17. Pluto
- 18. The first day of spring
- 20. Law that states the closer you are, the faster you orbit
- 21. Gas giants
Down
- 1. Distance between the tides
- 2. Universe started 13.8 billion years ago
- 3. 3 laws of planetary motion
- 4. Occurs in nuclear reactors
- 7. Season it would be in the southern hemisphere if it was Spring in the northern hemisphere
- 9. The longest day of the year; in the summer
- 12. milkyway galaxy
- 13. The smallest planet, closest to the sun
- 15. Rocky planets
- 16. Tide during a new moon
- 19. Tide during a 1st quarter moon