Across
- 2. 3D circular shape.
- 5. An imaginary line around the middle of a sphere.
- 7. Imaginary straight line going through the centre of a object that is spinning.
- 8. Sloping in one direction.
Down
- 1. The path or movement of an astronomical object (e.g. satellite, planet, moon) around another object.
- 3. Half of a sphere/planet/moon.
- 4. The outer layer of an object.
- 6. The spin of a planet or moon around its axis.