The Universe (Big Bang, Black Holes, Dark Matter), Galaxies)

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Across
  1. 2. Cloud of gas and dust in space
  2. 5. Explosive death of a massive star
  3. 6. The universe as an orderly, harmonious system
  4. 8. Icy body that develops a tail near the Sun
  5. 9. Force that attracts objects toward each other
  6. 11. Small rocky body orbiting the Sun
Down
  1. 1. Invisible matter inferred from gravitational effects
  2. 3. Region in space with gravity so strong that not even light escapes
  3. 4. Extremely bright active galactic nucleus
  4. 7. A celestial body orbiting a star
  5. 9. A massive system of stars, dust, and gas
  6. 10. Theory explaining the origin of the universe