Solar System

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Across
  1. 3. the greek god of sun
  2. 5. the roman god of underworld
  3. 6. the first satellite to travel outside of solar system
  4. 8. a big explosion
  5. 9. the greek goddess of the moon
  6. 10. has a twin named opportunity
Down
  1. 1. has a event horizon
  2. 2. a day on Mars
  3. 4. relates to the moon
  4. 7. one of the mars rovers