Optical parallax

Also found in: Encyclopedia.
the apparent displacement in position undergone by an object when viewed by either eye singly.

See also: Parallax

References in periodicals archive ?
"We began observing this star on October 31st last year," says Hugh Harris, leader of the observatory's optical parallax program, "and we obtained good coverage during November, December and January." Harris expects to get a believable parallax solution soon after the star enters the morning sky again, maybe in September or October this year.
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