lights

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Across
  1. 2. German astronomer best known for laws of planetary motion (6)
  2. 4. Another name for light-giving celestial body (8)
  3. 5. A woman in relation to her child (6)
  4. 7. Quality of the Sun (5)
  5. 10. The element the Moon mainly consists of (6)
  6. 13. Not conscious (11)
  7. 15. Sign ruled by the Moon (6)
  8. 16. The element the Sun mainly consists of (6)
  9. 19. An emotional state of reaction (7)
Down
  1. 1. Formulated a Sun-centered model of the Universe (10)
  2. 3. A man in relation to his child (6)
  3. 6. Earth's only natural satellite (4)
  4. 7. Star at the center of solar system (3)
  5. 8. Sign ruled by the Sun (3)
  6. 9. The element the Sun mainly consists of (8)
  7. 11. Author of "Tetrabiblos" (7)
  8. 12. Quality of the Moon (5)
  9. 14. The reason for which something is done (7)
  10. 17. Inherent inclination toward a behavior (8)
  11. 18. The shape of the sun (4)