Eksoplaneet: Verskil tussen weergawes
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==Voorkoms==
Daar is na verwagting in die [[Melkweg]] alleen miljarde planete (gemiddeld minstens een planeet vir elke ster, dus na skatting 100–400 miljard eksoplanete),<ref name="NASA-20130103">{{cite web |last=Claven|first=Whitney |title=Billions and Billions of Planets |url=http://www.nasa.gov/mission_pages/kepler/news/kepler20130103.html|date=3 Januarie 2013 |publisher=[[NASA]] |accessdate=3 Januarie 2013 }}</ref><ref name="Space-20130102">{{cite web |authors=Staff |title=100 Billion Alien Planets Fill Our Milky Way Galaxy: Study|url=http://www.space.com/19103-milky-way-100-billion-planets.html |date=2 Januarie 2013|publisher=Space.com |accessdate=3 Januarie 2013 }}</ref><ref name="Nature-20120111">{{cite journal |author=Cassan, A |title=One or more bound planets per Milky Way star from microlensing observations |url=http://www.nature.com/nature/journal/v481/n7380/full/nature10684.html|doi=10.1038/nature10684 |date=11 Januarie 2012 |journal=Nature |volume=481|pages=167–169 |accessdate=2012-01-11 |bibcode = 2012Natur.481..167C |last2=Kubas |first2=D.|last3=Beaulieu |first3=J.-P. |last4=Dominik |first4=M. |last5=Horne |first5=K.|last6=Greenhill |first6=J. |last7=Wambsganss |first7=J. |last8=Menzies |first8=J.|last9=Williams |first9=A. |issue=7380 |pmid=22237108|arxiv = 1202.0903 }}</ref><ref name="Space-20120111">{{cite web |last=Wall |first=Mike |title=160 Billion Alien Planets May Exist in Our Milky WayGalaxy |url=http://www.space.com/14200-160-billion-alien-planets-milky-galaxy.html |date=11 Januarie 2012 |publisher=Space.com |accessdate=2012-01-11 }}</ref> plus nog talle vrybewegende enkelplanete wat nie om ’n ster wentel nie.<ref>[http://arxiv.org/abs/1201.2687 Nomads of the Galaxy], Louis E. Strigari, Matteo Barnabe, Philip J. Marshall, Roger D. Blandford; skat dit op 700 voorwerpe groter as 10<sup>−6</sup> [[sonmassa]]s per [[hoofreeksster]] tussen 0,08 and 1 sonmassa, waarvan miljarde in die Melkweg is.</ref>
Die naaste eksoplaneet is [[Alpha Centauri Bb]]. Byna al die planete wat tot dusver waargeneem is, lê binne die Melkweg. Sterrekundiges aan die Harvard-Smithsonian-sentrum vir Astrofisika (CfA) het in Januarie 2013 aangedui dat daar "minstens 17 miljard" aardgrootte-eksoplanete in die Melkweg is.<ref name="Space-20130107">{{cite web |authors=Staff |title=17 Billion Earth-Size Alien Planets Inhabit Milky Way |url=http://www.space.com/19157-billions-earth-size-alien-planets-aas221.html |date=7 Januarie 2013 |publisher=Space.com |accessdate=8 Januarie 2013 }}</ref> Daar was wel al ’n paar moontlike waarnemings van eksogalaktiese planete.
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*[http://www.planetary.org/exoplanets/ Planetary Society Catalog of Exoplanets]
{{CommonsKategorie-inlyn|Exoplanets}}
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[[Kategorie:Eksoplanete| ]]
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