Across
- 1. Collection of stars, gas, and dust
- 5. The gassy star that the earth orbits
- 8. Chunk of rocky objects that orbits the sun
- 9. Layers of gas we need to survive
- 10. A scientist that specializes in space fields
- 13. From outside earth, beyond our planet
- 16. Celestial body of gas that emits light
- 17. Spherical celestial body orbiting the Sun
- 18. A continuous area or expanse
- 19. A natural satellite of a planet
Down
- 2. Distance light travels in one year
- 3. Contains everything in space
- 4. An icy, small body, like a ball of ice, rock, gas, and dust
- 6. Measure of gravitational pull on an object
- 7. Someone who does space travel
- 8. A hypothetical being from another planet
- 11. Like a giant cloud pf dust and gas in space
- 12. How much matter is in an object
- 14. The name of our planet
- 15. Collection of large and small bodies that orbit the sun