Across
- 4. the star at the centre of the solar system
- 5. earth's only natural star
- 7. smaller bodies in the orbit around the sun
- 8. saturn's natural satellite
- 9. the comet that is seen every 76 years
- 10. the planet found at last
- 12. this planet found 716 planets
Down
- 1. morning star
- 2. it is a dwarf planet in the solar system
- 3. the largest planet in the solar system
- 4. this was formed 4.6 billion years ago
- 6. the distance traveled by light in a vaccum in one tropical year
- 10. mission pluto's space shuttle was launched this many years ago
- 11. the blue planet