Across
- 1. We know the universe is expanding because of the _____ shift.
- 3. __________ universe is a universe that will re-collapse.
- 6. The universe is 12 - 14 ___________ years old.
- 7. ________ universe is a universe that keeps expanding.
Down
- 1. We can measure _____________ that was left behind from the big bang.
- 2. The big bang started from on single ________.
- 4. Edwin ________ was the first scientist to realize there were more galaxies outside of our own.
- 5. ________ universe is a universe that doesn't get any wider.