Across
- 2. — Region of space with gravity so strong light cannot escape
- 3. — Change in wavelength due to motion of a source
- 8. — Period when matter dominated radiation in the universe
- 10. — Shortening of light waves from approaching objects
- 11. — Process that powers stars by combining atoms
- 12. — Point of infinite density, such as in a black hole
- 13. — Pair of equal and opposite charges separated by distance
- 14. — The density needed for the universe to be flat
- 16. — Force involving electricity and magnetism
- 17. — Measure of how hot or cold something is
- 19. — Orbiting observatory used to study deep space
- 21. — SI unit of temperature
- 22. — Afterglow of the Big Bang detected as microwaves
- 23. — Rapid expansion of the universe just after its beginning
Down
- 1. — Apparent shift of an object due to viewpoint change
- 2. — Model describing the universe’s origin from expansion
- 3. — Invisible substance inferred from gravitational effects
- 4. — Study of heat and energy transfer
- 5. — Instrument used to measure light intensity
- 6. — Type of variable star used to measure distance
- 7. — Matter made of particles with opposite charge
- 9. — Study of the origin and structure of the universe
- 15. — Lengthening of light waves from objects moving away
- 18. — Early hot, dense state of the universe
- 20. — Distance light travels in one year