The moon's ascending node (the point in the sky where its orbit crosses the ecliptic from south to north) is moving westward ...

Experts from REI do a great job of explaining the basic parts of a compass and how to use them, but here is the breakdown: Magnetic declination is the angle between magnetic north and true north ...

The sun's changing declination is what determines whether the sun's rays strike us at a low angle or more directly. Declination on a celestial globe is analogous to latitude on a terrestrial globe.