A science fiction writer, writing a story about inhabitants on Earth in 14,000 A.D. who have survived a disaster that included the loss of modern navigational aids, describes them traveling due north across barren wastes by walking toward Polaris, the Pole Star. What is wrong with this situation?
a.Polaris will no longer be visible since its lifetime is only a few thousand years.
b. Polaris will no longer be due north, because of Earth's precession.
c. By that time, Polaris will be due south, not due north, because of the reversal of Earth's spin axis.
d. Polaris will have moved away from due north since it is moving rapidly with respect to surrounding stars.