Across
- 3. Movement around an axis
- 7. A regular oval shape, traced by a point moving in a plane so that the sum of its distances from two other points
- 8. A lens or other object that causes refraction
- 11. A way of expressing numbers that are to long to write in decimal form
- 12. An icy small Solar System body that releases gas when passing the sun
- 14. A year that contains one more day
Down
- 1. The curved path of an object around a star, planet, or moon
- 2. A small rock body that orbits around the sun
- 3. A piece of glass, metal, or other material for reflecting light in a required direction
- 4. Half of a sphere
- 5. A solid piece of debris from an object that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon
- 6. A physical representation of an object
- 9. One object around a center or another object
- 10. The distance around something
- 13. A force that pulls bodies towards the center of the earth, or any physical body having mass