Across
- 4. Scientists believe the universe will keep expanding because of a lack of ___.
- 5. The universe is currently ___.
- 6. Study of the universe.
- 7. The expansion of the universe can be compared to ___.
Down
- 1. Widely accepted theory for the beginning of the universe.
- 2. What star is 4080000000000km away from the Earth.
- 3. How many billion years ago was the beginning of the universe.
- 6. Thermal energy left over from the explosion at the beginning of the universe. (Acronym)