Keywords: Stellarparallax parsec1 cn chs.svg Booyabazooka 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 Stellarparallax_parsec1 svg 2011-01-29 17 36 UTC Stellarparallax_parsec1 svg Original uploader was Srain at http //en wikipedia org en wikipedia Later version s were uploaded by Babbage at http //en wikipedia org en wikipedia derivative work AsukaCN <span class signature-talk >talk</span> ç® ä½“ä¸æ–‡åŒ– Stellarparallax_parsec1 svg Booyabazooka Original upload log This image is a derivative work of the following images File Stellarparallax_parsec1 svg licensed with PD-user 2008-06-10T15 30 30Z Ashishbhatnagar72 555x870 18258 Bytes <nowiki> This image is an altered version of en Image Stellarparallax2 svg which is an SVG version of en Image Stellarparallax2 png Stellarparallax2 svg </nowiki> Uploaded with derivativeFX Parsec unit of length Parallax |