Classic Cross-out

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Across
  1. 1. a dwarf planet that was a planet
  2. 5. a ship that crashed into an iceberg in 1912
  3. 6. Mars' 1 of 2 moons
  4. 8. 2-18 the largest star that is known to exist
  5. 9. 1 a 45-year old machine that currently operates in Oort Cloud
  6. 10. A one of the largest black holes that we know of
Down
  1. 2. a moon that has similar atmospheric conditions of that on Earth
  2. 3. the largest planet in our solar system (the sun is a star by the way)
  3. 4. our neighboring galaxy
  4. 5. a tall plant that produces some of our planet's oxygen
  5. 7. a planet in our solar system that has 145 moons