The Solar System & Normal and Active Galaxies

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Across
  1. 2. The only dwarf planet in the Solar System.
  2. 3. The process of a star collapsing under its own gravity, leading to an extremely dense object.
  3. 6. A cloud of gas and dust in space from which stars are formed.
  4. 7. The spiral galaxy in which our Solar System resides.
  5. 10. The region of space around a black hole from which nothing can escape.
  6. 12. The scientific study of the universe beyond the Earth's atmosphere.
  7. 13. The hottest planet in the Solar System.
  8. 14. The star at the center of our Solar System.
  9. 15. The name of the mission that landed the first humans on the Moon.
Down
  1. 1. The phenomenon in which a star explodes, briefly outshining an entire galaxy.
  2. 4. The largest moon of Neptune.
  3. 5. A massive celestial object that emits a large amount of energy.
  4. 8. The region between Mars and Jupiter where numerous asteroids are found.
  5. 9. The galaxy that is the largest member of the Local Group.
  6. 11. The planet known for its iconic rings.