Even when Venus is nearest to the earth the diameter of the planet subtends an angle not much more than one minute of arc.
"The Story of the Heavens"
Robert Stawell Ball
Half of this major axis, or, what comes to the same thing, the angle which the radius of the earth's orbit subtends as seen from the star, is called the star's "annual parallax."
"The Story of the Heavens"
Robert Stawell Ball
In the technical language of astronomers, we may state that the longest diameter of the ellipse never subtends an angle of more than one and a half seconds.
"The Story of the Heavens"
Robert Stawell Ball