Nebula Fun!!

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Across
  1. 3. The First Planet From The Sun
  2. 5. A Giant Sphere Of Burning Hydrogen Gas
  3. 7. Known For Having The Most Moons In The Solar System
  4. 8. When An Object Orbits Another Object
Down
  1. 1. The Biggest Gas Giant In The Solar System
  2. 2. A Collection Of Stars That Form A Familiar Pattern
  3. 4. Named After The God Of War
  4. 6. The pull that keeps planets together