Preposition: of

• star: A parsec is the distance at which the observed parallax of the star is equal to 1 second of arc.

Converse of object

• measure: They took advantage of this fact to explain to them that this distance was obtained by measuring the parallax of the moon.

• call: Seeing the two stars allowed astronomers to calculate the foreground star's distance from Earth, using a method called parallax.

• use: However, even with the most powerful modern telescopes, there is only so far you can go with using parallax.

• determine: A transit of Venus, as it is called, was once of great practical observational importance for determining the solar parallax.

• give: His reasoning was correct, but even Tycho's marvelous instruments were not accurate enough to register stellar parallax given the vast distances involved.

Adjective modifier

• trigonometric: Trigonometric parallax is used to measure the distances of the nearby stars.

• spectroscopic: Also HR diagram, spectral types, and spectroscopic parallax.

• stellar: His reasoning was correct, but even Tycho's marvelous instruments were not accurate enough to register stellar parallax given the vast distances involved.

• solar: From their data the first accurate value of the solar parallax was found, giving the distance from the Earth to the sun.

• annual: Annual parallax is caused by the Earth's yearly orbit around the Sun.

• geocentric: What is its true declination, after correcting for geocentric parallax?

Modifies a noun

• p: The parallax angle p is one-half of the total angular shift.

• angle: The parallax angle p is one-half of the total angular shift.

• error: The butterfly is relatively small, but is in focus and there is no evidence of parallax error.

• effect: This utilizes the parallax effect of a stereo photograph compounded from two photographs taken simultaneously by two cameras separated by a known distance.

• method: Other parallax methods involve the motion of the sun among nearby stars.

• measurement: The Hubble Space Telescope can make parallax measurements to a precision of 0.001 " and the recently launched Hipparchus satellite to 0.002 " .

Noun used with modifier

• motion: The isolated the motion parallax cue by constructing a random dot display that was yoked to the movement of the head.

• star: Taking a look at the skinny star parallax triangle above and realizing that the triangle should be over 4,500 times longer ( !