Across
- 3. Cluster of stars, dust, gas & matter (2)
- 4. Universe includes ALL _____ & space that exists(1)
- 6. Our planetary system
- 8. Our galaxy
- 12. 13.8 million years old (1)
Down
- 1. Theory that states the universe was created from an explosion or rapid expansion (8)
- 2. Hypothetical substance that makes up most of the universe (21)
- 5. universe is mostly made of hydrogen and _____ (12)
- 7. Distant galaxies are moving _____ from Earth (16)
- 9. Distance light travels in one year (6)
- 10. Cosmic background ______________ (17)
- 11. Stars are constantly burning ______ (19)