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