Across
- 3. Force pulling objects together
- 6. Seven days
- 7. Icy space object with tail
- 11. Object orbiting a planet
- 13. Small rocky space object
- 16. Movement from past to future
- 17. Current time
- 18. Twenty-four hours
- 21. Twelve months
- 22. Shooting star
- 23. Region with strong gravity
- 25. Path around a star
Down
- 1. Sixty minutes
- 2. Distance light travels in a year
- 4. Small unit of time
- 5. Sixty seconds
- 8. Thousand years
- 9. Our home planet
- 10. Universe as a whole
- 12. Time yet to come
- 14. Time that has happened
- 15. Space traveler
- 19. Ten years
- 20. Four weeks
- 24. Hundred years