Inner Planets

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Across
  1. 1. a celestial object that orbits a planet
  2. 3. contains water and oxygen to support life
  3. 6. moves around in a circle repeatedly
  4. 7. earth-like
  5. 9. the layer around a planet that is made up of gases that vary in thickness and composition
Down
  1. 2. 4 planets in our solar system farthest from the Sun
  2. 4. 4 planets in our solar system closest to the sun
  3. 5. Earth's sister planet
  4. 8. has the shortest orbit around the Sun
  5. 10. known to be the Red planet