early sailors discovered a gradual change in position of the north star. This discovery helped to prove that?

2 ⤊

They were of course???

2007-08-18 11:04:32 · answer #1 · answered by Anonymous · 0⤊ 0⤋

The rotational axis of the earth wobbles (like a spinning top).

2007-08-19 01:06:56 · answer #2 · answered by ToneAL5 1 · 1⤊ 0⤋

that the pole of a magnetic compass is not at the true north or rotational pole of the earth.

2007-08-19 08:07:51 · answer #3 · answered by lare 7 · 0⤊ 0⤋

That the Earth orbits the sun on an axis (i.e. it is not straight up and down).

2007-08-18 12:15:42 · answer #4 · answered by Anonymous · 1⤊ 0⤋