Solar apex

The solar apex (Apex of the Sun's Way) is the direction that the Sun travels with respect to the Local Standard of Rest. In layman terms, it's the "target" within the Milky Way that the Sun appears to be "chasing" as it orbits the galaxy. It should not be confused with the Sun's "motion" through the Zodiac, which is not a real 3D motion, but a 2D parallax effect due to change in the vantage point of an observer on Earth (the Earth's revolving around the Sun).