Movement of the Earth

123456789101112
Across
  1. 2. A natural satellite of a planet
  2. 5. Someone who studies and observes celestial bodies
  3. 6. A fixed path taken by a planet moving around the Sun
  4. 10. The movement of an object turning on an axis
  5. 12. An object in space that revolves around another object
Down
  1. 1. A system of planets revolving around the Sun
  2. 3. A self-luminous celestial body
  3. 4. The natural pull exerted by objects on one another
  4. 7. A single or complete cycle of an orbital motion
  5. 8. A natural pull caused by gravity
  6. 9. A celestial body that obits around a star
  7. 11. An imaginary straight line through the centre of the Earth