To an observer on the earth the constellations appear to move in orbits around the earth because of its rotation, just as the sun and moon do.
(the constellations; appear; T:To an observer on the earth) (the constellations; to move; in orbits around the earth; because of its rotation)
the constellations the constellations
appear to move
T:To an observer on the earth
in orbits around the earth because of its rotation