Inner Planets

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Across
  1. 2. What the inner planets are the closest to
  2. 3. Earth-like planets made up of rocks or metals with a hard surface
  3. 5. The path of a celestial object or spacecraft around a star, planet, or moon
  4. 6. A celestial body that makes an orbit around a planet
  5. 8. What the inner planets are to each other
  6. 9. The hottest planet in the solar system
Down
  1. 1. The first four planets whose orbits lie inside the asteroid belt.
  2. 4. The gases surrounding the Earth or another planet
  3. 6. An inner planet with no atmosphere
  4. 7. Number of inner planets