Astronomy 2

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Across
  1. 3. The shape of the orbit of any celestial body around the Sun (7)
  2. 8. A modern theory of gravity was proposed by this scientist (8)
  3. 11. the Moon cannot be seen because it is on the same side of the sky as the Sun, it is called a ... Moon (3)
  4. 13. The word used to indicate that the amount of the Moon we can see from night to night is increasing (6)
  5. 14. The phase of the Moon when a lunar eclipse can occur (4)
  6. 16. The word used to describe what happens when a celestial object passes in between the Earth and the Sun (7)
  7. 17. The weakness of gravity in space can lead to a decrease in the density of this body tissue (4)
  8. 20. In summer, the Northern Hemisphere is tilted ....... the Sun (7)
  9. 22. The "banana" shape of the Moon (7)
  10. 24. The word used to indicate that the amount of the Moon we can see from night to night is decreasing (6)
  11. 26. The type of eclipse that occurs when the shadow of the Moon falls on a part of the Earth (5)
  12. 28. The part of the Earth where both day and night are always 12 hours long (7)
Down
  1. 1. The lowest tide of the month (4)
  2. 2. The different appearances of the Moon during its cycle are called its ...... (6)
  3. 4. The highest tide of the month (6)
  4. 5. The force of gravity is calculated by multiplying its .... by acceleration (4)
  5. 6. The partial shadow that occurs during an eclipse (8)
  6. 7. The scientist who in the 1600's first developed the idea of gravity (6)
  7. 9. The seasons are a result of the .... of the Earth's axis of rotation (4)
  8. 10. The time taken for a planet to rotate on its own axis (3)
  9. 12. At its first ....... the Moon looks like the letter D (7)
  10. 15. In between each quarter and a full Moon, the phase is referred to as ....... (7)
  11. 18. The longest day of the year is called the summer ........ (8)
  12. 19. One benefit of space exploration is the development of new ......... (9)
  13. 21. When the length of the day is equal to the length of the night (7)
  14. 23. The number of high and low tides each day (3)
  15. 25. The force that holds all matter in the Universe together (7)
  16. 27. The time taken for a planet to revolve once around the Sun (4)