Space Crossword by Nayan

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