North from Cassiopeia

The five stars making up Cassiopeia, on the opposite side of Polaris, look like the letter W. A line from the middle of the W brings you to Polaris,(see Figure 8.9 and Figure 8.9b).



^ This orbit takes 28500 years

if^Ecliptic Pole


This orbit takes


28 500 years.

CE 1000


North Pole —

Plane of earth's orbit

de* n

™ V

It is the same

at the

South Pole

8.8 Precession of the Equinoxes

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