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