The Theoretical Strike Date is listed first and is based on a 5,000 year Vulcan period. Before the time of Newton or Celestial Mechanics, during a time when witchcraft was widely believed, Mother Shipton and Nostradamus foresaw comet impacts on Earth near the beginning of this millenium, nearly 500 years in their future. Three thousand years earlier, Moses recorded the Hebrew Pentateuch that contained encoded dates of these impacts. Other biblical sources including Christ, Daniel and Zechariah warned of this danger. Surprisingly, all these sources form a consist description of the impending catastrophe.
Scientists usually reject data from such sources.
But long period comets can suddenly appear in our skies with only fractions of a year's warning until they pass near Earth's orbit on their trajectory around the Sun. We have no long range detection and warning apparatus in place. The consistency of these combined warnings enhances the possibility that major comet strikes are pending. Should one occur, it would cause an unimaginable environmental catastrophe. Perhaps mankind should take action on these diverse warnings.