Space Crossword

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Across
  1. 1. - Clouds of glowing gas
  2. 3. year - The distance that light travels in one year
  3. 6. - The fifth planet from the sun
  4. 7. - The fraction of the Moon that we see illuminated by sunlight
  5. 10. - A star ending its life in a huge explosion
  6. 12. - A mathematical model that intertwines the dimensions of space and time into a single four-dimensional manifold
  7. 14. - A spiral galaxy also known as Messier 31
  8. 15. - A collection of stars, gas, and dust that ranges from 10,000 to 100,000 light years in diameter
Down
  1. 2. - A small rocky body that orbits the sun
  2. 4. - A massive ball of gas that releases extreme amounts of energy
  3. 5. - A supermassive black hole gorging on gas at the center of a distant galaxy
  4. 8. - An event that occurs when the shadow of a planet or moon falls on another body
  5. 9. - A distinct, named pattern of stars
  6. 11. - The astronaut on Earth that communicates with the crew in space
  7. 13. - The force that attracts a body towards another physical body having mass