Across
- 2. The movement of an object around another object; circling
- 3. The path an object takes as it revolves a point in space.
- 5. An imaginary line about which an object rotates.
- 6. The distance that light travels in 1 year.
- 8. The average distance between Earth and the sun.
- 9. The Earth-centered model of the solar system first proposed by Ptolemy.
Down
- 1. The sun-centered model of the solar system first proposed by Copernicus
- 4. The type of belt located just beyond the orbit of Neptune. (contains small bodies of ice.)
- 5. The type of belt located between the orbits of Mars and Jupiter (many asteroids are located here too)
- 7. The spinning motion of a planet on its axis, creating day and night.