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Across
  1. 2. telescopes/ A type of telescope that uses lenses to focus visible light
  2. 6. telescopes/ A type of telescope that uses mirrors to focus visible light
  3. 8. Wobble in Earth's rotational axis
  4. 10. Ratio of the distance between the foci to the length of the major axis
  5. 12. Plane that contains Earth's orbit around the Sun
Down
  1. 1. Layer of loose, ground-up, rock on the lunar surface
  2. 3. Planets/ Rocky-surfaced, relatively small, dense inner planets closets to the Sun
  3. 4. Light-colored, mountainous, heavily cratered areas of the Moon, composed mostly of lunar breccias
  4. 5. High, cool, light-colored cloud that rises and flows rapidly in the Jovian atmosphere
  5. 7. Rotation/ Describes the state at which the Moon's orbital and rotational periods are equal
  6. 9. Motion/ A planet's backward motion in the sky
  7. 11. Low, warm, dark-colored cloud that sinks and flows rapidly in the Jovian atmosphere