What's In Space?

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Across
  1. 2. Huge clouds of gas and dust in space.
  2. 6. It is the source of Earth's heat.
  3. 7. The smallest planet in the solar system.
  4. 10. Rocky bodies in space.
  5. 11. Energetic particles and electromagnetic waves that travel around space.
  6. 12. World beyond the Sun.
  7. 13. Large circular light source to Earth from space during the night.
  8. 14. Inescapable holes in space.
Down
  1. 1. Worlds that are a part of our solar system.
  2. 3. Clutter of stars that form an image in space.
  3. 4. Ghost particles in space.
  4. 5. Giant collections of stars in space.
  5. 6. Shines light into Earth's night, and appears to be tiny from our distance in Earth.
  6. 8. Cosmic snowballs of frozen gas in space.
  7. 9. Invisible forces that guide solar wind in space.