Solar system

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Across
  1. 1. Best known for there long and streaming tails
  2. 3. Most known dwarf planet
  3. 4. Streak of light in the sky
  4. 5. One small step for man
  5. 7. Ring of icy bodies just outside of Neptune's orbit
  6. 8. Biggest explosion humans have ever seen
Down
  1. 2. Smaller pieces of Asteroids
  2. 5. Small rocky object that orbits the sun
  3. 6. Relating to the Moon
  4. 9. What makes a black hole