| 11. | Based on astronomical calculations and observations, " the moon has passed the conjunction point,"
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| 12. | Gou derived a cubic interpolation formula for his astronomical calculations.
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| 13. | However, according to modern astronomical calculations this eclipse was not visible from Mecca or Medina.
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| 14. | Here the largest source of error in the date was the uncertainty of 16th-century astronomical calculations.
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| 15. | She assisted him with mathematical and astronomical calculations.
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| 16. | The difficulty here is that the Jewish calendar was based not on astronomical calculation but on observation.
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| 17. | This could be used for astronomical calculations such as solar and planetary longitudes and could predict eclipses.
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| 18. | Astronomical calculations show that 65?N summer insolation should increase gradually over the next 25, 000 years.
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| 19. | The Astronomical Computing Bureau, Columbia University, performed astronomical calculations representing the state of the art in computing.
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| 20. | Kane and his officers also established a scientific station to observe climatic conditions and to make astronomical calculations.
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