What is the horizontal parallax of the Sun and what is it equal to? What is the annual solar parallax and what is it equal to?

By definition, the horizontal parallax of the Sun is the maximum angle at which the equatorial radius of the Earth is visible from the Sun (p-8.8 “). The annual parallax of any star is the maximum angle at which the radius of the Earth’s orbit is visible from the star. The double value of this value is determined by the movement of a star against the background of distant space objects when observing from diametrically opposite points of the earth’s orbit.The position of the Sun relative to the stars changes by 180 ° in six months. Consequently, the annual parallax of the Sun is l = 90 °. This value, in contrast to the horizontal parallax, has no practical significance.

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