Across
- 2. Name the heaviest object ever launched into space
- 6. A volcano that erupts ice!
- 9. Which planet takes almost 30 Earth years to orbit
- 10. first space probe to leave the solar system
- 11. A comet's tail points to which direction of sun
Down
- 1. Who wrote the book "On the Revolutions of heavenly spehere
- 3. Which is the closest galaxy to Earth outside the Milky Way
- 4. Who was the first living creature in space
- 5. most explosive moon in the solar system
- 7. the tallest mountain in the solar system
- 8. study that describes the large scale properties of the universe as a whole
- 9. What kind of galaxy is the Milky Way