Astronomy Unit - Crossword

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Across
  1. 5. Bodies of rock at revolve around the sun
  2. 7. A system that uses light to tell when an object is moving away from us
  3. 9. The measurement unit used to measure in space
  4. 10. A large group of dust, gas, stars, and solar systems.
Down
  1. 1. A cloud of stars and dust, the birthplace of stars.
  2. 2. Rocks that burn up while entering a planet's atmosphere
  3. 3. An object made of ammonia, methane, dust, and ice, orbits a sun.
  4. 4. Composed of matter and energy, it is everything.
  5. 6. The galaxy that we live in
  6. 8. Spherical celestial bodies, mostly made of helium and hydrogen, produces light.