As you know, one tropical year is the interval between two successive moments of the vernal equinox. How many tropical years pass between successive sun coverage of some distant star near the ecliptic?
The interval between two covers of a distant star by the Sun (if the star is absolutely motionless, this interval is equal to the period of the Earth’s revolution around the Sun) and the tropical year are different time intervals, although very close to each other. The reason for the difference lies in the phenomenon of the Earth’s axis precession, due to which the vernal equinox moves along the ecliptic towards the apparent motion of the Sun, completing one revolution in about 26,000 years. As a result, returning to the same star, the Sun makes a little more than one revolution around the vernal equinox. During this period, 1 + (1/26000) passes, that is, about 1.00004 tropical.
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