As the earth rotates these constellations appear to revolve around Polaris, whose position never changes because it is over the North Pole.
(the earth; rotates; ) (these constellations; appear; ) (these constellations; to revolve; around Polaris) (Polaris; never changes; because it is over the North Pole) (it; is; over the North Pole)
the earth these constellations these constellations Polaris it
rotates appear to revolve never changes is
around Polaris
because it is over the North Pole
over the North Pole