Across
- 4. electromagnetism and strong and weak nuclear forces
- 9. the opposite of every subatomic particle
- 12. a formulation of the law of conservation
- 17. erly stage of the big bang theory
- 18. light is stretched
- 21. the unit of temp in international system of units
- 24. variable star that pulsates
- 25. extreme rapid expansion of the universe
- 26. the shift of a object and its from two povs
- 27. a compact astronomical object
- 28. not a until of time but the unit of light traveling
Down
- 1. condition of being similar
- 2. consists of stars and planets
- 3. ave changes between the observer and the wave
- 5. a branch of physics
- 6. a nucldear reaction
- 7. measures the strength of electromagnetic radiation
- 8. light does not interact with
- 10. a era of gravitational effect of matter
- 11. progress of existence
- 13. density of matter
- 14. the heat of something
- 15. a completely empty space
- 16. the spectral lines of a stellar spectrum
- 19. a two dimensional area enclosed by lines
- 20. interactions between electric charges
- 22. a pair of equal and oppositely charged
- 23. describing the origin of the universe