Kepler-186f: Verskil tussen weergawes

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Lyn 16:
| radius= {{val|1.11|ul=raarde}}
| temperatuur=
| wentelperiode= 129,946 dae
| datum= 17 April 2014
| ontdekkers= [[Kepler-ruimteteleskoop]]
Lyn 22:
| status= Gepubliseer
}}
 
'''Kepler-186f''' is ’n [[eksoplaneet]] wat om die [[rooidwerg]]ster [[Kepler-186]] wentel.<ref name="NYT-20140417">{{cite news |last=Chang |first=Kenneth |title=Scientists Find an 'Earth Twin', or Maybe a Cousin |url=http://www.nytimes.com/2014/04/18/science/space/scientists-find-an-earth-twin-or-maybe-a-cousin.html |date=17 April 2014 |work=New York Times }}</ref><ref name="AP-20140417">{{cite news |last=Chang |first=Alicia |title=Astronomers spot most Earth-like planet yet |url=http://apnews.excite.com/article/20140417/DAD832V81.html |date=17 April 2014 |agency=Associated Press |deadurl=no |archivedate=2014-04-18 |archiveurl=http://web.archive.org/web/20140418172517/http://apnews.excite.com/article/20140417/DAD832V81.html }}</ref><ref name="BBC-20140417">{{cite news |last=Morelle |first=Rebecca |title='Most Earth-like planet yet' spotted by Kepler |url=http://www.bbc.co.uk/news/science-environment-27054366 |date=17 April 2014 |work=BBC News |deadurl=no |archivedate=2014-04-18 |archiveurl=http://web.archive.org/web/20140418172858/http://www.bbc.co.uk/news/science-environment-27054366 }}</ref> Dit is sowat 500&nbsp;[[ligjare]] van die [[Aarde]] af<ref name="SCI-20140418">{{cite web |title=Science, gratis weergawe |url=http://www.nasa.gov/sites/default/files/files/kepler186_main_final.pdf |format=PDF |deadurl=no |archivedate=2014-04-18 |archiveurl=https://web.archive.org/web/20140418183443/http://www.nasa.gov/sites/default/files/files/kepler186_main_final.pdf }}</ref> en is die eerste eksoplaneet met ’n radius min of meer dié van die Aarde wat in die [[bewoonbare sone]] van ’n ander ster gevind is. [[Nasa]] se [[Kepler-ruimteteleskoop]] het dit bespeur met die verbygangmetode, saam met vier ander planete wat nader aan die ster voorkom – hulle is almal effens groter as die Aarde.<ref name="NASA-20140417">{{cite web |last=Johnson |first=Michele |last2=Harrington |first2=J.D. |title=NASA's Kepler Discovers First Earth-Size Planet In The 'Habitable Zone' of Another Star |url=http://www.nasa.gov/ames/kepler/nasas-kepler-discovers-first-earth-size-planet-in-the-habitable-zone-of-another-star |date=17 April 2014 |publisher=Nasa |deadurl=no |archivedate=2014-04-17 |archiveurl=http://web.archive.org/web/20140417193315/http://www.nasa.gov/ames/kepler/nasas-kepler-discovers-first-earth-size-planet-in-the-habitable-zone-of-another-star/ }}</ref> Dit is op 17 April 2014 aangekondig<ref name="NASA-20140417" /> en daarna in die tydskrif [[Science]] gepubliseer.<ref name="SCI-20140418" />
 
== Bewoonbaarheid ==
Kepler-186f wentel elke 129,9 dae om ’n ster met sowat 4% van die [[Son]] se ligsterkte. Dit kom voor aan die buitenste rand van die bewoonbare sone, soortgelyk aan die posisie van [[Mars (planeet)|Mars]] in die [[Sonnestelsel]].<ref name="SCI-20140418" /> Die enigste fisiese eienskap wat direk afgelei kan word van die waarnemings, is die radius van 1,11 keer dié van die Aarde.<ref name="AP-20140417" /><ref name="NASA-20140417" /> Dit is dus sowat 11% groter. Dit beteken die totale oppervlakte van Kepler-186f is sowat 23% groter en die volume sowat 37% groter as die aarde s'n.
 
Die moederster het vier ander planete, maar hulle is te na aan die ster om vloeibare water te hê. Kepler-186f se ligging verder weg van die ster beteken nie noodwendig dit is bewoonbaar nie; dit hang ook af van sy atmosfeer, wat onbekend is.<ref name="Clark-2014">{{cite web |last=Clark | first=Stephen |title=Earth's 'cousin' planet lies 500 light-years away |work=[http://www.spaceflightnow.com/ Spaceflight Now] |date=17 April 2014 |url=http://www.spaceflightnow.com/news/n1404/17kepler/ |deadurl=no |archivedate=2014-04-18 |archiveurl=http://web.archive.org/web/20140418183648/http://www.spaceflightnow.com/news/n1404/17kepler/ }}</ref>
 
== Sien ook ==
* [[Bewoonbare sone]]
* [[Superaarde]]
 
== Verwysings ==
{{Verwysings}}
{{Lug3|19|54|36.651|+|43|57|18.06|492}}
 
== Eksterne skakels ==
* [http://exoplanet.eu/catalog/kepler-186_f/ Kepler-186f by "The Extrasolar Planets Encyclopaedia"]
{{CommonsKategorie-inlyn|Kepler-186 f}}
* [[Lêer:Crystal txt.png|15px]] Hierdie artikel is vertaal uit die [http[://en.wikipedia.org/wiki/:Kepler-186f |Engelse Wikipedia]]
 
[[Kategorie:Superaardes in die bewoonbare sone]]