Across
- 2. furthest away planet from the sun.
- 6. the earth is in the middle of the solar system.
- 8. a natural example is a moon and there are artificial ones that are sent from earth.
- 10. and example of one of these is the Hubble.
Down
- 1. the motion that look like the planet mars is moving backwards but it is not.
- 3. ice and dust that follows highly elliptical orbits from far away planets to close to the sun.
- 4. sun is in the middle of the solar system.
- 5. who came up with the idea of the sun being in the middle of the solar system.
- 7. the closest planet to the sun
- 9. rocky objects in the sky