Across
- 3. What do we call matter that is not stars or galaxies?
- 5. Recently, scientists have discovered that the expansion of the universe is ____________.
- 7. Many scientists believe dark matter is a combination of ______ matter and undiscovered stuff.
- 9. Dark matter ______ be sensed by astronomers.
Down
- 1. What other dark thing is causing the universe expansion to accelerate?
- 2. Do we know more about dark matter or dark energy?
- 4. Dark matter is known because it affects the ______ of objects around it.
- 6. Dark matter has ______.
- 8. Dark energy could make up more than ____ of the Universe.
- 10. Do we know if dark matter really exists?