Across
- 4. What galaxy is Earth apart of?
- 9. How many years have humans been around?
- 10. What keeps us grounded on Earth?
- 11. What shape are galaxies?
- 12. What is another word for the universe?
Down
- 1. What is the biggest planet?
- 2. Who was the first person to land on the Moon?
- 3. What is the moment of the universe's creation called?
- 5. What existed before the creation of the universe?
- 6. What do we see in the night sky?
- 7. What heats planet Earth?
- 8. What's the closest planet to earth?