Image: Stellarparallax parsec1

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Description: Parsec Definition diagram The apparent motion of a nearby star is a small ellipse in the sky relative to background stars over the period of a year. The viewpoint is defined as the Earth. The angle representing major axis radius of the elliptical path is the parallax angle. A parsec is defined as the distance to an object whose parallax angle = 1 arc second.
Title: Stellarparallax parsec1
Credit: This image is an altered version of :Image:Stellarparallax2.svg, which is an SVG version of :Image:Stellarparallax2.png. Stellarparallax2.svg was released into the public domain by its creator, Booyabazooka.
Author: Srain at English Wikipedia
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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Parsec

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