Across
- 2. Unit of distance used for stars
- 3. Everything we can observe
- 4. Something that proves itself right & wrong at the same time
- 6. Something that exists and can be seen, especially something unusual or interesting
Down
- 1. All of the universes together
- 5. Expansion of the universe
- 7. Unproven idea
- 8. A tool to mathematicaly describe something