Editing Dune (section)

===Extraterrestrial dunes===
[[File:Gusev Crater, Mars.jpg|thumb|Sand dune on Mars]]
{{See also|List of extraterrestrial dune fields}}
Dunes can likely be found in any environment where there is a substantial atmosphere, winds, and dust to be blown. Dunes are common on [[Mars]] and in the equatorial regions of [[Titan (moon)|Titan]].

Titan's dunes include large expanses with modal lengths of about 20–30&nbsp;km. The regions are not topographically confined, resembling sand seas. These dunes are interpreted to be longitudinal dunes whose crests are oriented parallel to the dominant wind direction, which generally indicates west-to-east wind flow. The sand is likely composed of hydrocarbon particles, possibly with some water ice mixed in.<ref>[http://www.planetary.org/blog/article/00000733/ Peeking Through the Haze: Titan's Surface, part II—The Planetary Society Blog | The Planetary Society<!-- Bot generated title -->] {{webarchive|url=https://web.archive.org/web/20070428143333/http://www.planetary.org/blog/article/00000733/ |date=28 April 2007 }}</ref>

Dunes are a popular theme in science fiction, featuring in depictions of dry [[Desert planet]]s<ref name="Touponce 7">{{Cite book|last=Touponce |first=William F. |year=1988 |title=Frank Herbert|chapter=Intellectual Background |location=[[Boston]]|publisher=Twayne Publishers imprint, G. K. Hall & Co|page=119 |isbn=978-0-8057-7514-3}}</ref> appearing as early as the 1956 film ''[[Forbidden Planet]]'' and [[Frank Herbert]]'s 1965 novel ''[[Dune (novel)|Dune]]''.<ref>{{cite web|url=http://www.culturevulture.net/Movies4/ForbiddenPlanet.htm |first=Les|last=Wright|title=''Forbidden Planet'' (1956)|publisher=Culturevulture.net ([[Internet Archive]]) |access-date=May 7, 2006 |archive-url= https://web.archive.org/web/20060507194241/http://www.culturevulture.net/Movies4/ForbiddenPlanet.htm |archive-date=May 7, 2006}}</ref><ref name="Hladik">{{cite web|url=http://www.scifi.com/sfw/issue42/classic.html |title=Classic Sci-Fi Reviews: ''Dune''|first=Tamara I.|last=Hladik|publisher=SciFi.com|access-date=April 20, 2008 |archive-url =https://web.archive.org/web/20080420150907/http://www.scifi.com/sfw/issue42/classic.html |archive-date = April 20, 2008}}</ref><ref name="Dune Endures">{{Cite magazine |first=Jon |last=Michaud |url=http://www.newyorker.com/online/blogs/books/2013/07/dune-endures.html |title=''Dune'' Endures |magazine=The New Yorker |date=July 12, 2013 |access-date=November 27, 2013}}</ref> The environment of the desert planet [[Arrakis]] (also known as Dune) in the [[Dune (franchise)|''Dune'' franchise]]<ref>{{cite book |last1=Lynch |first1=Tom |last2=Glotfelty |first2=Cheryll |last3=Armbruster |first3=Karla |title=The Bioregional Imagination: Literature, Ecology, and Place |date=2012 |publisher=[[University of Georgia Press]] |isbn=9780820343679 |page=230 |url=https://books.google.com/books?id=flt4Uea3oOcC&pg=PA230}}</ref> ''Dune'' in turn inspired the ''[[Star Wars]]'' franchise,<ref>{{cite web |work=D. A. Houdek |title=Star Wars is Dune |url=http://www.dahoudek.com/pages/starwarsdune.htm |access-date=October 1, 2006 |archive-date=8 October 2006 |archive-url=https://web.archive.org/web/20061008120525/http://www.dahoudek.com/pages/starwarsdune.htm |url-status=dead }}</ref> which includes prominent theme of dunes on fictional planets such as [[Tatooine]], [[Geonosis]], and [[Jakku]].