Across
- 2. Closest star to our Sun
- 3. First Estonian satellite
- 5. Largest planet in our Solar System
- 7. Earth's only natural satellite
- 10. The distance light travels in one year in a vacuum
- 11. A person who goes into space
- 12. The person, who our 1,5m telescope was named after
Down
- 1. A planet known for its red colour
- 4. How we call planets that are outside our Solar System
- 6. A dwarf planet that was once considered the 9th planet in our Solar System
- 8. The name of the first animal to orbit the Earth
- 9. First planet from the Sun