Space adventure

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Across
  1. 2. A large system of stars, gas, and dust held together by gravity
  2. 4. The path an object follows around a planet or star
  3. 6. The star at the center of our solar system
  4. 7. A rocky or metallic body that orbits the Sun
  5. 9. The planet known as the Red Planet
  6. 10. A natural satellite that orbits a planet
  7. 13. layer of gases surrounding Earth
  8. 14. A bright streak of light in the sky caused by a meteoroid burning up
  9. 15. A large ball of burning gas in space
  10. 16. A group of stars that form a recognizable pattern
  11. 17. A spacecraft that carries people and supplies to space
  12. 18. The force that pulls objects toward each other
Down
  1. 1. The planet with rings around it
  2. 3. The first person to walk on the moon, Neil ________
  3. 5. A tool used to see distant objects in space
  4. 8. system A system of planets orbiting a star
  5. 11. The coldest and farthest planet in our solar system
  6. 12. way The name of our galaxy
  7. 14. The study of space, stars, and planets