Across
- 2. Rapid expansion right after the universe began
- 7. The universe itself or emptiness
- 8. Force involving electric and magnetic fields
- 10. Light shifted toward shorter wavelengths
- 11. Large empty regions in space
- 13. A type of star used to measure distance
- 15. Distance light travels in one year
- 20. Density needed to stop expansion of universe
- 23. fireball Early hot, dense state of the universe
- 24. Four basic interactions in physics
- 25. Device for measuring light intensity
Down
- 1. Period when matter dominated the universe
- 3. Opposite of matter
- 4. Stretching of light to longer wavelengths
- 5. Region of space with extremely strong gravity
- 6. Study of the origin and structure of the universe
- 9. Change in wavelength due to motion
- 12. Unit of temperature in science
- 14. Invisible mass affecting gravity
- 16. Measure of how hot or cold something is
- 17. Process that powers stars
- 18. Method for measuring star distance using angles
- 19. Large system of stars, gas, and dust
- 21. Point of infinite density
- 22. Measured progression of events