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<ref name="proxima b discovery paper">{{cite journal | bibcode = 2016Natur.536..437A | title = A terrestrial planet candidate in a temperate orbit around Proxima Centauri | journal = Nature | volume = 536 | issue = 7617 | pages = 437–440 | last1 = Anglada-Escudé | first1 = Guillem | last2 = Amado | first2 = Pedro J. | last3 = Barnes | first3 = John | last4 = Berdiñas | first4 |
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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 |s2cid=119067572|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 name="proxima b discovery paper">{{cite journal
| | | journal | volume = 536
| issue = 7617
| pages = 437–440
| last1 = Anglada-Escudé
| first1 = Guillem
| last2 = Amado
| first2 = Pedro J.
| last3 = Barnes
| first3 = John
| last4 = Berdiñas
| first4 = Zaira M.
| last5 = Butler
| first5 = R. Paul
| last6 = Coleman
| first6 = Gavin A. L.
| last7 = de la Cueva
| first7 = Ignacio
| last8 = Dreizler
| first8 = Stefan
| last9 = Endl
| first9 = Michael
| last10 = Giesers
| first10 = Benjamin
| last11 = Jeffers
| first11 = Sandra V.
| last12 = Jenkins
| first12 = James S.
| last13 = Jones
| first13 = Hugh R. A.
| last14 = Kiraga
| first14 = Marcin
| last15 = Kürster
| first15 = Martin
| last16 = López-González
| first16 = María J.
| last17 = Marvin
| first17 = Christopher J.
| last18 = Morales
| first18 = Nicolás
| last19 = Morin
| first19 = Julien
| last20 = Nelson
| first20 = Richard P.
| last21 = Ortiz
| first21 = José L.
| last22 = Ofir
| first22 = Aviv
| last23 = Paardekooper
| first23 = Sijme-Jan
| last24 = Reiners
| first24 = Ansgar
| last25 = Rodríguez
| first25 = Eloy
| last26 = Rodríguez-López
| first26 = Cristina
| last27 = Sarmiento
| first27 = Luis F.
| last28 = Strachan
| first28 = John P.
| last29 = Tsapras
| first29 = Yiannis
| last30 = Tuomi
| first30 = Mikko
| first31=Mathias |last31=Zechmeister
| display-authors = 3
| year = 2016
| arxiv = 1609.03449
| doi = 10.1038/nature19106
| pmid = 27558064
| s2cid = 4451513
| url=https://www.nature.com/articles/nature19106
}}</ref>
=== Pulsar planets ===
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