Across
- 4. A measure of the total amount of material in a body
- 6. The largest planet in our solar system
- 8. A large grouping of stars
- 10. A natural or artificial object that moves around a planet
- 11. An exploding star that produces an extremely bright light
- 12. A large spherical object that orbits the sun or and another star
- 14. A zodiac symbol representing a fish
- 16. The farthest planet from the sun
- 18. A small rocky object in orbit around the Sun
- 19. A bright ball of hot gas
- 20. The planet we all live on
Down
- 1. Known as the "red planet"
- 2. a small celestial body, primarily made of ice and rock
- 3. The hottest planet in our solar system
- 5. A noncontact force keeping us on Earth
- 7. The total or partial blocking of one celestial body by another
- 9. A layer of gases, surrounding a planet, moon or star
- 13. A large cloud of dust and gas that is in space
- 15. The planet with the most moons in our entire solar system
- 17. The closest planet to the sun