Across
- 3. an instrument used to look at the stars
- 4. the red planet
- 6. the hottest planet
- 7. the planet furthest from the sun
- 10. the number of planets in our solar system
Down
- 1. a person who travels in space
- 2. the planet closes to the sun
- 5. Neil Armstrong was the first person to walk the ...
- 8. dwarf planet with two moons
- 9. the planet we call our universe