Earth's motions & space crossword

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Across
  1. 1. consists of a star and everything that orbits that star
  2. 4. tide in which the difference between high and low tide is the greatest
  3. 6. moon phase where the side of the moon facing earth is completely visible (100% illuminated)
  4. 8. the massive expansion of an extremely small, dense and hot bit of matter- the most widely accepted theory of the origin of the universe
  5. 9. all of space and everything in it
  6. 12. the day in the spring when everyone on earth experiences equal day and night (12 hours of each)
  7. 14. the distance light travels in one year (about 5.88 trillion miles)
  8. 16. when the ocean water is at its lowest level during an approximately 12 hour period
  9. 17. turning or spinning on an axis
  10. 20. an imaginary line drawn around the earth that divides the earth into northern and southern hemispheres
  11. 22. the shortest day of the year (least daylight)
  12. 23. the rising and falling of the ocean's surface
  13. 24. a huge burning sphere of gas fueled by nuclear fusion
  14. 26. moon phases where more than half of the side of the moon facing earth is visible (may be waxing or waning)
Down
  1. 2. the explosion of a dying high-mass star
  2. 3. the spiral-shaped galaxy in which we live
  3. 5. moon phase where no reflected light from the sun is visible on earth
  4. 7. the motion of one object moving completely around another in an orbit
  5. 10. the longest day of the year (most daylight)
  6. 11. a huge cloud of dust and gas in space held together by gravity
  7. 13. a region of space having a gravitational field so intense that no matter or radiation can escape
  8. 15. a huge system of millions or billions of stars, together with gas and dust, held together by gravity
  9. 18. tide with the least amount of difference between high and low tide
  10. 19. moon phases where there is an increasing amount of visible light on the moon's surface (light on the right)
  11. 21. the path an object, such as a planet, takes as it revolves around another object
  12. 22. moon phases where there is an decreasing amount of visible light on the moon's surface (light on the left)
  13. 25. light from objects moving away from us in space will shift towards the red end of the visible light spectrum