Editing Space exploration (section)

===Alien life===
{{Main|Astrobiology|Extraterrestrial life}}
Astrobiology is the [[interdisciplinary]] study of life in the universe, combining aspects of [[astronomy]], [[biology]] and geology.<ref name="NASAastrobio">{{cite web |url=http://astrobiology.arc.nasa.gov/ |title=NASA Astrobiology |publisher=Astrobiology.arc.nasa.gov |access-date=24 May 2012 |url-status=dead |archive-url=https://web.archive.org/web/20150928003207/http://astrobiology.arc.nasa.gov/ |archive-date=28 September 2015}}</ref> It is focused primarily on the study of the [[origin of life|origin]], distribution and [[evolution]] of life. It is also known as '''exobiology''' (from Greek: έξω, ''exo'', "outside").<ref name="aleph-x">{{cite web |url=http://www.aleph.se/Trans/Words/x.html |title=X |publisher=Aleph.se |date=11 March 2000 |access-date=24 May 2012 }}</ref><ref name="www-pho">{{cite web |url=http://www.worldwidewords.org/articles/phobias.htm |title=Fears and dreads |publisher=World Wide Words |date=31 May 1997 |access-date=24 May 2012 }}</ref><ref name="itw-1066">{{cite web |url=http://www.itwire.com.au/content/view/11647/1066/ |title= Scientists will look for alien life, but Where and How? |publisher=iTWire |first1=William |last1=Atkins |date=27 April 2007 |access-date=24 May 2012 |archive-url=https://web.archive.org/web/20081014092633/http://www.itwire.com.au/content/view/11647/1066/ |archive-date=14 October 2008 |url-status=dead}}</ref> The term "Xenobiology" has been used as well, but this is technically incorrect because its terminology means "biology of the foreigners".<ref name="bio-ast">{{cite web |url=http://biocab.org/Astrobiology.html |title=Astrobiology |publisher=Biocab.org |access-date=24 May 2012 |archive-date=12 December 2010 |archive-url=https://web.archive.org/web/20101212184044/http://biocab.org/Astrobiology.html |url-status=dead }}</ref> Astrobiologists must also consider the possibility of life that is chemically entirely distinct from any life found on Earth.<ref name="AstroDNA">{{cite web |title=Launching the Alien Debates |last=Ward |first=Peter |author-link=Peter Ward (paleontologist) |url=http://www.astrobio.net/debate/2168/launching-the-alien-debates |date=8 December 2006 |work=[[Astrobiology Magazine]] |access-date=25 December 2013 |archive-url=https://web.archive.org/web/20201023105824/https://www.astrobio.net/extreme-life/launching-the-alien-debates/ |archive-date=2020-10-23 |url-status=usurped}}</ref> In the Solar System, some of the prime locations for current or past astrobiology are on Enceladus, Europa, Mars, and Titan.<ref name="sc-extra">{{cite web|url=http://spacechronology.com/extra.html |archive-url=https://archive.today/20120714162249/http://spacechronology.com/extra.html |url-status=dead |archive-date=14 July 2012 |title=Astrobiology: the quest for extraterrestrial life |publisher=Spacechronology.com |date=29 September 2010 |access-date=24 May 2012 }}</ref>