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=== Exoplanets ===
An [[exoplanet]] causes its host star to move in a small orbit around the center of mass of the star-planet system. This 'wobble' can be observed if the radial velocity of the star is sufficiently high. This is the [[Methods of detecting exoplanets|radial velocity method]] of detecting exoplanets.<ref name="brown" /><ref name="radial" /> Using the mass function and the radial velocity of the host star, the minimum mass of an exoplanet can be determined.<ref>{{cite web |url=http://exoplanets.org/methodology.html |title=Documentation and Methodology |publisher=[[Exoplanet Data Explorer]] |access-date=April 25, 2016 }}</ref><ref>{{cite journal|doi=10.1086/504701|title=Catalog of Nearby Exoplanets|year=2006|last1=Butler|first1=R.P.|author1-link=R. Paul Butler|last2=Wright|first2=J. T.|last3=Marcy|first3=G. W.|author3-link=Geoffrey Marcy|last4=Fischer|first4=D. A.|author4-link=Debra Fischer|last5=Vogt|first5=S. S.|author5-link=Steven S. Vogt|last6=Tinney|first6=C. G.|last7= Jones|first7=H. R. A.|last8= Carter|first8=B. D.|last9=Johnson|first9=J. A.|last10=McCarthy|first10=C.|last11=Penny|first11=A. J.|journal=[[The Astrophysical Journal]]|bibcode = 2006ApJ...646..505B|volume=646|issue=1|pages=505–522|arxiv = astro-ph/0607493 |display-authors=8}}</ref>{{rp|9}}<ref name="boffin" /><ref>{{cite web |url=http://www.phy.duke.edu/~kolena/invisible.html |title=Detecting Invisible Objects: a guide to the discovery of Extrasolar Planets and Black Holes |first1=John |last1=Kolena |publisher=[[Duke University]] |access-date=April 25, 2016 }}</ref> Applying this method on [[Proxima Centauri]], the closest star to the solar system, led to the discovery of [[Proxima Centauri b]], a [[terrestrial planet]] with a minimum mass of {{Earth mass|1.27}}.<ref>{{cite journal|last1=Anglada-Escudé|first1= G.| last2= Amado|first2=P. J.|last3=Barnes|first3= J.|last4= Berdiñas| first4= Z. M.|last5=Butler|first5=R. P.|last6=Coleman|first6= G. A. L.|last7=de la Cueva| first7 =I.|last8= Dreizler|first8=S.|last9= Endl|first9= M.|last10= Giesers|first10= B.|last11=Jeffers|first11=S. V.|last12=Jenkins|first12= J. S.|last13=Jones|first13=H. R. A.|last14=Kiraga|first14= M.|last15= Kürster|first15=M.|last16=López-González| first16= M. J.|last17= Marvin|first17= C. J.|last18=Morales|first18= N.|last19= Morin|first19=J.|last20= Nelson|first20=R. P.|last21=Ortiz|first21=J. L.|last22= Ofir|first22= A.| last23= Paardekooper|first23=S.-J.|last24=Reiners|first24= A.|last25= Rodríguez|first25= E.|last26=Rodrίguez-López|first26= C.|last27= Sarmiento| first27= L. F.|last28=Strachan|first28=J. P.|last29=Tsapras|first29= Y.| last30=Tuomi|first30=M.|last31=Zechmeister|first31=M.|title=A terrestrial planet candidate in a temperate orbit around Proxima Centauri|journal=Nature|date=25 August 2016|volume=536|issue=7617|pages=437–440|doi=10.1038/nature19106|url=http://www.eso.org/public/archives/releases/sciencepapers/eso1629/eso1629a.pdf|language= en|issn= 0028-0836}}</ref>
=== Pulsar planets ===
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