The spelling of "crossed parallax" follows the typical English pronunciation rules. "Crossed" is spelled with a silent "e" at the end, indicating a long "o" sound. The "a" in "parallax" is pronounced like the "a" in "apple," while the "ll" is pronounced like a single "l." The "x" is silent. In IPA phonetic transcription, "crossed parallax" is spelled /krɑst pəˈræləks/. This term refers to a type of astronomy measurement used to determine distances between celestial objects.
Crossed parallax is a term used in astronomy to describe the apparent movement of an object against background stars when viewed from two different observation points. It refers to the change in the position of an object, such as a star or a planet, as observed from two different positions on Earth.
When observing celestial objects, astronomers use a technique called parallax to measure their distances. Parallax is the angular displacement of an object caused by the change in the observer's perspective. It is measured by comparing the apparent position of the object against the background stars when viewed from two different positions.
Crossed parallax specifically occurs when the apparent motion of an object against the background stars changes direction when viewed from two different observation points. This means that the object appears to move in one direction relative to the background stars when viewed from one position, and then in the opposite direction when viewed from another position.
Crossed parallax is commonly observed when studying binary star systems, where two stars orbit around a common center of mass. The parallax of each star is measured from two observation points to determine their individual distances. By combining these measurements, astronomers can accurately determine the distance and other properties of these binary star systems.
In conclusion, crossed parallax refers to the change in the apparent position of an object against background stars when viewed from two different observation points, usually observed in binary star systems.
Heteronymous p.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.