Across
- 2. The observed displacement from 2 viewpoints
- 5. 2 charged particles of opposite charges
- 7. Progression of events from past to future
- 8. Donut-shaped and a black hole in the middle
- 11. An object moving away from us
- 14. Empty space between celestial bodies
- 15. Region of space where time becomes infinite
Down
- 1. Any system of stars that make the universe
- 3. Made up of antimatter particles
- 4. Instrument that measures brightness
- 6. A type of star that pulsates radially
- 9. Study of the evolution of the universe
- 10. A unit of temperature
- 12. Period of rapid expansion of the universe
- 13. Determines how hot or cold something is