Across
- 4. cosmic system of matter
- 6. mass of the sun
- 10. point of no return
- 11. our galaxy
- 13. stimulates sight
- 15. center of the milky way
- 16. physical substance
- 17. tunnel between 2 black holes
- 18. speed of light
- 19. transmission of energy
- 20. the universal force
Down
- 1. the flow of energy at universal speeds
- 2. region of space with gravitational attraction
- 3. giant stars die in supernova
- 5. union of space and time
- 7. can't escape from it
- 8. 2 stars orbiting a common center
- 9. german born theoretical physicis
- 12. the dimensions of height depth and width
- 14. powerful steller explosion