has magnetic north changed

Magnetic north is the point on the Earth's surface towards which the north end of a compass needle points. It is not the same as the geographic North Pole, which is the axis around which the Earth rotates. The magnetic north pole is the point on the Earth's surface where the magnetic field lines are directed vertically downwards.

Over the course of history, the magnetic north pole has shifted its position several times. The shifts are caused by fluctuations in the Earth's magnetic field, which is generated by the movement of molten metal in the Earth's core. These fluctuations can be caused by factors such as the changing strength of the core's magnetic field, variations in the Earth's rotation, and the effects of other magnetic fields on the Earth's surface.

One consequence of the shifting magnetic north pole is that the direction indicated by a compass can differ from true north, which is the direction towards the geographic North Pole. This difference is known as magnetic declination. In some parts of the world, magnetic declination can be significant enough to affect navigation and other activities that rely on accurate compass readings.

It's important to note that magnetic north is not the same as the North Star or Polaris. Polaris is a fixed celestial object that is used for navigation because it is always located at true north. Magnetic north, on the other hand, is subject to change.