Astronomy and Space

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Across
  1. 4. The obscuration of one celestial body by another.
  2. 8. A vast system of stars, gas, and dust held together by gravity.
  3. 9. A small body of matter from outer space that enters the earth's atmosphere.
  4. 10. A cloud of gas and dust in outer space, visible as an illuminated patch.
  5. 13. A massive, luminous celestial body of gas that shines by its own light.
  6. 14. A celestial body moving in an elliptical orbit around a star.
  7. 15. A very luminous active galactic nucleus.
Down
  1. 1. A famous space telescope.
  2. 2. The force that attracts any two masses.
  3. 3. A self-propelled vehicle that can travel in outer space.
  4. 5. The universe considered as a whole.
  5. 6. The region beyond the earth's atmosphere.
  6. 7. The sixth planet from the Sun, known for its rings.
  7. 11. A small, rocky object orbiting the Sun.
  8. 12. The curved path of an object around a star, planet, or moon.