Across
- 2. It take one what for the Earth to orbit the Sun
- 4. Rocky and metallic bodies found all over the solar system
- 5. The total sum of all matter and energy
- 8. The closest planet to the Sun
- 9. There is believed to be 100-500 billion what in the universe
- 12. Furthest planet from the Sun
- 13. Neil Armstrong was the first person to walk on the what
- 15. A rotating sphere of hot glowing gases
- 16. What occurs when the Moon passes between the Sun and the Earth
- 18. large balls of hot gas
Down
- 1. Known as the red planet
- 3. A group of stars are called
- 6. Uranus and Neptune are known as what giants
- 7. Largest planet
- 9. Jupiter and Saturn are known as what giants
- 10. What planet has rings around it
- 11. There is an asteroid what orbiting the Sun
- 14. Formally known as a planet now known as a dwarf planet
- 16. The planet you live on
- 17. How many planets are there