Across
- 1. Name of the first artificial satellite in space.
- 6. Observatory equipment
- 7. Planet's path
- 9. Colour of a sunset on Mars
- 10. Collection of stars
- 11. Largest of the planets
- 12. ____ Gagarin: First person in space
Down
- 2. Mars or Neptune for example
- 3. Exploding star
- 4. Halley's _____
- 5. Furthest planet from the sun
- 8. Attractive force