The Inner Planets: Station Lab - Challenge It

123456789
Across
  1. 2. Celestial object that orbits the Earth
  2. 3. The inner planet that is the "sister" to Earth in size
  3. 5. Layers of gas that protect a planet from things like solar radiation and solar winds
  4. 8. The farthest planer from the Sun
  5. 9. The planet that has the shortest orbit
Down
  1. 1. The biggest celestial bodies that orbit our Sun
  2. 4. Is the only planet that can support life
  3. 6. Earth-like
  4. 7. Moves repeatedly around something
  5. 9. Has a volcano name Olympus Mons