The common reference in the Solar System isn't the sun's rotation, but the ecliptic plane. That is the plane around which the Earth revolves around the Sun. The Ecliptic plane is constant, at least on the order of thousands of years. Here is the north plane, followed by the south, grabbed from Wikipedia.

For reference, the Sun is close to that pole, only 6 degrees off, although I'm not sure about declination.

The common reference in the Solar System isn't the sun's rotation, but the ecliptic plane, or the invariant plane. The ecliptic plane is nearly constant, on the order of thousands of years, and is the plane around which the Earth revolves around the Sun, and the invariant plane involves the momentum of the objects in the Solar System, and is thus dominated by Jupiter. The difference between the two is less than 2 degrees, and is thus sufficient for our purposes. Here is a view of the north Ecliptic Plane, followed by the south, grabbed from Wikipedia.

For reference, the Sun is close to that pole, only 6 degrees off, although I'm not sure about declination.

The common reference in the Solar System isn't the sun's rotation, but the ecliptic plane. That is the plan around which the Earth revolves around the Sun. The Ecliptic plane is constant, at least on the order of thousands of years. Here is the north plane, followed by the south, grabbed from Wikipedia.

For reference, the sun is close to that pole, only 6 degrees off, although I'm not sure the direction.

The common reference in the Solar System isn't the sun's rotation, but the ecliptic plane. That is the plane around which the Earth revolves around the Sun. The Ecliptic plane is constant, at least on the order of thousands of years. Here is the north plane, followed by the south, grabbed from Wikipedia.

For reference, the Sun is close to that pole, only 6 degrees off, although I'm not sure about declination.