Keywords: Horizons-es.svg horizon in Spanish with an approximate formula for the distance to the true horizon horizonte en español con una fórmula aproximada para la distancia al horizonte celeste 2015-03-01 Horizons svg 50 Horizons svg Acdx derivative work David Abián other versions translated into Spanish Abián Horizons svg cc-zero Original upload log This image is a derivative work of the following images File Horizons svg licensed with PD-user-w 2010-05-23T03 35 23Z Acdx 679x430 3235 Bytes <nowiki>fix</nowiki> 2010-05-23T03 34 18Z Acdx 679x430 3228 Bytes <nowiki>added units</nowiki> 2009-10-11T02 49 51Z Acdx 679x430 2984 Bytes <nowiki>again</nowiki> 2009-10-11T02 48 16Z Acdx 679x468 2984 Bytes <nowiki>update</nowiki> 2008-12-24T06 13 38Z Acdx 1705x1028 18763 Bytes <nowiki></nowiki> 2007-09-13T09 40 36Z Liftarn 536x341 60742 Bytes <nowiki> Made by me in Illustrator Acdx 19 38 5 September 2006 UTC Originally from http //en wikipedia org en wikipedia; desc</nowiki> Uploaded with UploadWizard Horizon diagrams Abu Rayhan al-Biruni |