Astronomy

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Across
  1. 2. the fifth planet from the Sun and the largest in the Solar System
  2. 3. The large round object that circles the Earth and that shines at night by reflecting light from the sun.
  3. 5. the sixth planet from the Sun and the second largest planet in our solar system.
  4. 9. the study of everything in the universe beyond Earth's atmosphere.
  5. 11. 11
  6. 12. the second planet from the Sun, and our closest planetary neighbor.
  7. 14. the planet on which we live
Down
  1. 1. the smallest planet in our solar system and nearest to the Sun
  2. 3. Contains hundreds of billions of stars like our sun.
  3. 4. A celestial body moving in an elliptical orbit around a star.
  4. 6. The fourth planet from the Sun
  5. 7. A small, icy object that orbits the sun and has a long "tail" of gas
  6. 8. Any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources.
  7. 10. A large cylinder-shaped object that moves very fast by forcing out burning gases, used for space travel or as a weapon
  8. 13. a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.