That's a good point, especially as the Earth was regarded as the center of the universe. Ptolemy apparently had to put Mercury and Venus inside of the Sun's orbit [1] (note that if you replace 'inside of the Sun's orbit' with 'between the Earth and the Sun', you get a proposition that holds then and now! Ptolemy had to deal with the fact that Mercury and Venus do not stray far from the Sun.)
Nevertheless, in that model, Saturn ends up as the outermost heavenly body, other than the stars, presumably because it has the longest period. Even so, it does not count as the sixth unless you include either the Sun or Moon, but not both.
Nevertheless, in that model, Saturn ends up as the outermost heavenly body, other than the stars, presumably because it has the longest period. Even so, it does not count as the sixth unless you include either the Sun or Moon, but not both.
[1]http://galileoandeinstein.physics.virginia.edu/more_stuff/Ap...