File:Proper motion.JPGDescriptionProper motion.JPG English: vectors showing relation between an object's proper motion and its velocity Date 12/30/08 Source Own work Author
File:Proper motion mk.JPGchoice. This image is a derivative work of the following images: File:Proper_motion.JPG licensed with Cc-by-sa-3.0, GFDL 2008-12-30T21:21:01Z Brews ohare
File:Proper motion de.svgchoice. This image is a derivative work of the following images: File:Proper_motion.JPG licensed with Cc-by-sa-3.0, GFDL 2008-12-30T21:21:01Z Brews ohare
File:Proper motion da.svgDenne fil er et afledt produkt (oversat til dansk) af filen: Proper motion de.svg This file is licensed under the Creative Commons Attribution-Share Alike