Day, Night and Years

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Across
  1. 5. Expressed in or measurable by numerical quantities.
  2. 6. The curved path of a celestial object around a star, planet, or moon.
  3. 7. The spinning of an object around its internal axis.
  4. 9. An imaginary line about which a body rotates
  5. 10. A regular oval shape, traced by a point moving in a plane.
Down
  1. 1. The movement of one object around another in an orbit.
  2. 2. Describing characteristics or qualities rather than numerical measurements.
  3. 3. The period of darkness between sunset and sunrise.
  4. 4. The time taken by a planet to make one revolution around the sun.
  5. 8. The period of light between sunrise and sunset, or a 24-hour rotation period