Super blue blood moon

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Across
  1. 1. The current pole star.
  2. 5. “Once in a blue moon” refers to the instance when there is a full moon _______ in a calendar month.
  3. 6. The furthest point of a moon on its orbit is called the ______________.
  4. 8. An eclipse season and occur about every _______ months and last for 34 days.
  5. 9. For an eclipse to occur, the moon, sun and Earth must be lined up along the same ________.
  6. 10. This word is derived from the word "Moon".
  7. 11. Earth's ___________________absorbs some colors while allowing others to pass through.
  8. 12. The blue moon can never occur in this month.
  9. 15. A supermoon occurs when the full moon occurs at the moon's _________ (the closest point of the moon's orbit closest to Earth)
  10. 16. The pole star for the ancient Egyptians.
  11. 19. A blood moon is a moon formed during a __________eclipse.
Down
  1. 2. “Blood moon" occurs during a lunar eclipse when faint red _____________ shines out from the edges of the moon.
  2. 3. The next pole star.
  3. 4. The next blue moon in 2018 will occur in _______.
  4. 5. During a year with blue moon, there are _________ lunations as compared to the usual twelve.
  5. 7. The Moon's orbit around Earth is _____________.
  6. 13. The earth is ___________ the moon and the sun.
  7. 14. A lunar eclipse is when the ______'s shadow blocks the sun.
  8. 17. The main body of the shadow.
  9. 18. Lunar eclipse occurs only during a _______ moon.