space

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Across
  1. 2. The curved path of a celestial object
  2. 4. Rocks that enter Earth's atmosphere
  3. 7. The people that go into space
  4. 8. Star-forming regions
Down
  1. 1. A Russian astronaut
  2. 3. Outer space as observed in astronomy
  3. 5. A place where solar systems and stars are
  4. 6. Found in the Kuiper Belt