parallax
noun
the apparent displacement of an observed object due to a change in the position of the observer.
parallactic
-
a word derived from
parallax.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In the course of a year it is found that the difference in declination undergoes a periodic change, and from that change the parallactic ellipse can be computed.
From The Story of the Heavens by Sir Robert S. (Robert Stawell) Ball
Unless the deviations from the parallactic line of the stellar motions balance one another on the whole, their discussion may easily be as fruitless as that of observations tainted with systematic errors.
From Scientific American Supplement, No. 829, November 21, 1891 by Various
In a somewhat more popular manner, we would say that one thousand times the major axis of the very largest parallactic ellipse would not be as great as the diameter of the full moon.
From The Story of the Heavens by Sir Robert S. (Robert Stawell) Ball
This is partly due to its own motion, but it is also largely due to the parallactic displacement arising from the rotation of the earth, which may amount to so much as twenty seconds.
From The Story of the Heavens by Sir Robert S. (Robert Stawell) Ball
At a certain date, which can be readily computed, the star is at one end of the parallactic ellipse, and six months later the star is at the other end.
From The Story of the Heavens by Sir Robert S. (Robert Stawell) Ball
