Across
- 3. Closest planet to the sun
- 4. third closest planet to the sun
- 5. terrestrial planets closest to the sun
- 8. an object that orbits a planet
- 9. a celestial object that orbits a planet
- 10. a celestial body moving in an elliptical orbit around a star.
Down
- 1. second closest planet to the sun
- 2. the four inner planets
- 6. the layer of gasses around a planet
- 7. fourth closest planet to the sun